How to Clean a Smelly Washer (And Keep It Fresh!)

Hey there!
So your washing machine smells. I totally get it. You know what’s funny? Just last Tuesday, I walked into this absolutely GORGEOUS home in Waterford. Like, seriously — magazine-level beautiful. Everything spotless. And the second we opened the laundry room door… whew. That smell hit both of us like a wall.
My client was mortified. She kept apologizing (girl, don’t!). But here’s what I told her, and I’m telling you too: this happens to literally everyone. Even people who clean their entire house every single week. Even ME, if I let it go too long.

How-to-clean-a-smelly-washer

Your washer is supposed to clean things, right? So when it starts smelling funky instead, it just feels… wrong. Frustrating. Maybe even embarrassing if you’ve got guests coming over.
But good news: it’s almost always a super easy fix. No repairman needed. Just some basic know-how and maybe 45 minutes of your afternoon.
I’m gonna walk you through exactly what I do when I handle this for my clients. My husband Mykola and I run GoShineUp Cleaning together here in Oakland County, and honestly? Smelly washers are like top 3 most common calls we get. So yeah. I’ve seen some STUFF.
Your washer can smell fresh again. Promise.
Let’s fix it.

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Wait, Why Does My Washer Smell So Weird?

Okay, real talk. Your washing machine should smell like… nothing. Maybe a teeny hint of fresh laundry if you literally just finished a load. But that’s it.
Not sour.
Not musty.
Definitely not like someone’s gym bag died in there.
So what’s happening?
Usually it’s buildup. Soap that never fully rinsed away. Old fabric softener sitting in the dispenser getting all gross and sticky. Water trapped in spots you didn’t even know water COULD get trapped (I’m looking at you, rubber door seal). And here’s the thing most people don’t realize — SO much gunk builds up inside these machines over time. Detergent residue. Lint. That thick, slimy fabric softener situation. And if you’ve got hard water? Which, hello, this is Michigan — add mineral deposits to that fun list.
The usual culprits I see:

  • Too much detergent — Most of us use way, WAY too much. That extra soap doesn’t make your clothes cleaner. It just sticks around inside the machine and starts smelling weird.
  • The rubber gasket (if you’ve got a front-loader) — That rubber seal around the door holds water in its folds. And that standing water becomes a perfect little breeding ground for mildew. Gross but true.
  • The drain filter you didn’t know existed — Yeah. Your washer has a filter. When’s the last time you cleaned it? (If the answer is “never,” you’re not alone. Most people have never touched theirs.)
  • Fabric softener — So sticky. So gunky. Sits in the dispenser, never fully rinses, starts smelling funky.
  • Only using cold water — Great for saving energy! Not great for dissolving detergent properly. Which means more buildup.

Okay, so now you know WHY it smells.
Let’s actually fix it.

Here’s What You’re Gonna Do

Look, I’m gonna be honest with you. There are like six steps here. But you don’t have to do them all today. Start with #1 and #4 (detergent drawer and drain filter). That alone will probably solve your problem.
The rest? Do it when you have time. This isn’t all-or-nothing.
Ready?

Step 1: Clean That Nasty Detergent Drawer

First up — pull out your detergent drawer. (Some of these are tricky. If it won’t budge, there’s usually a little release button. Check your manual.)
Got it out?
Good.
Now actually LOOK at it.
See that slimy gel stuff in the corners? That sticky residue coating the fabric softener compartment? THAT is your problem right there. That stuff has been sitting in there for months, getting funkier and funkier, and it smells exactly as gross as it looks.
Here’s what to do:

  • Take it apart. Most detergent drawers have little plastic inserts that pop out. Get those out too.
  • Soak it. Hot water + regular dish soap. If it’s really bad (and it probably is), let it sit for like 15-20 minutes.
  • Scrub it. Grab an old toothbrush. Get into all those corners and channels where gunk loves to hide. Really get in there.
  • Rinse it like crazy. Hot water. Make sure every bit of soap and slime is gone.
  • Dry it completely. This is important! If you put it back wet, you’re just asking for more mildew.

Why does this matter so much? Because that gel buildup is literally what’s making your whole machine smell sour. Fix this first, and you’re already like halfway done.

Step 2: The Rubber Gasket (Front-Loader People, This Is YOUR Moment)

If you have a front-loading washer, THIS is probably your problem. Like, 70% chance this is EXACTLY where your smell is coming from.
That rubber seal around the door? It’s designed to keep water inside during the wash cycle. Which is great for washing. Terrible for literally everything else. Because water gets trapped in those rubber folds, sits there between loads, and basically turns into a mildew factory.
Okay, I’m not gonna lie to you. The first time you pull back those folds and see what’s actually hiding in there? You might be a little horrified.
Hair. Lint. Slimy soap residue. Sometimes straight-up black mold spots that look like a science experiment gone wrong.
But we’re gonna clean it. And it’s honestly easier than it looks.

  • Grab supplies: Just a microfiber cloth and some warm water with a drop of dish soap. I use Dawn. Nothing fancy.
  • Pull back the gasket. Like, really pull it back to expose all the hidden areas.
  • Wipe everything. All the lint. The hair. That black slime situation. Just… get in there. I know it’s gross. But you’re doing great.
  • For stubborn spots: Old toothbrush. Be gentle though — you don’t wanna damage the rubber.
  • Rinse and dry. Use a clean damp cloth to rinse, then dry it completely with a towel.

IMPORTANT: Don’t use harsh chemicals or straight bleach on this rubber. It’ll break down over time and then you’re looking at an expensive replacement. If you’ve got serious mold, a little OxiClean dissolved in water works fine.

There. You just tackled the grossest part. Everything else is downhill from here.

Step 3: Clean the Drum Itself

Okay, now we’re getting to the easy part. You’ve got a few options here. Pick whichever sounds good to you:

OPTION A: Baking Soda (if the smell isn’t that bad)

Got baking soda in your pantry? Perfect.
Sprinkle about half a cup directly into the empty drum. Then run the hottest, longest cycle your washer has. That’s it. The baking soda just absorbs odors naturally. Super simple.

OPTION B: Vinegar (for moderate grossness)

White vinegar — the cheap stuff from the grocery store works fine.
Pour 2 cups directly into the drum. NOT into the dispenser — just straight into the drum. Then run a hot cycle. Two things to remember:

  1. NEVER mix vinegar with bleach. Like, ever. Toxic fumes = very bad.
  2. Don’t make this a regular thing. Occasional use is fine, but doing it constantly can wear down rubber parts over time.

OPTION C: Washer Cleaning Tablets (this is what I actually use)

Honestly? This is my go-to. Both at home and for my clients. The ones I keep stocked in my cleaning van:

  • Affresh — My favorite. About $10 at Walmart, Target, Meijer, wherever. One tablet does the job.
  • Tide Washing Machine Cleaner — Also great. Very similar to Affresh. Grab whichever’s on sale.
  • OxiClean Washing Machine Cleaner — If you’ve got a serious mold situation, this one’s stronger but still safe.

How to use them: Drop one tablet directly in the drum (not the dispenser). Run the longest, hottest cycle you’ve got. Done.
Why do I like these best? They’re specifically made for this job. They work on both front-loaders and top-loaders. And honestly, they just… work. No guessing, no mixing stuff, no wondering if you did it right.
Pick one. Run it. Move on.

Step 4: The Drain Filter (Where Socks Go to Die)

Okay, confession time.
How many of you knew your washing machine even HAS a drain filter?
Yeah, that’s what I thought.
Here’s the thing — this one step solves like HALF the mystery smell situations I deal with. People clean everything else, the washer still smells, and then we pop open this filter and… oh. OH. There it is.

Findcing the thing:

Most front-loaders have a little panel at the bottom front. Sometimes it’s hidden behind a decorative strip. Top-loaders vary — some have them inside the drum, some don’t have them at all (check your manual).

Before you open it:

PUT DOWN TOWELS. Like, multiple towels. Because water IS gonna come out. Not a flood, but enough to make a mess if you’re not ready for it.

Opening it:

Turn the cap slowly. Let water drain out onto your towels. This part takes a minute. Just… let it do its thing. Once the water stops, pull the whole filter out.

What you’ll find in there:

Oh buddy.Okay.
Lint. For sure. Hair? Yep. Coins? Probably. Small items of clothing? I once found FIVE SOCKS in one client’s filter. FIVE.
And then there’s this thick, gray, slimy sludge that’s basically decomposed soap and lint having a party together. It smells TERRIBLE.
But THIS is why your washer smells terrible. So we’re fixing it.

Cleaning it:

Rinse under hot running water. Scrub with your fingers or a brush if it’s really nasty. Get ALL that gunk out. Check the housing too (where the filter goes) — sometimes there’s more gunk hiding in there.

Put it back:

Screw it back in. Make sure it’s TIGHT. If it’s loose, you’ll get leaks during your next wash.

How often should you do this?

Once a month if you’re running a lot of loads. Every other month if you’re not. Put it on your calendar. Seriously. This one thing will save you so much smell drama.

Step 5: One More Hot Cycle (The Final Rinse)

After you’ve done all that cleaning, run one more hot cycle with NOTHING in it. No cleaner, no vinegar, nothing.
This just rinses away any loosened gunk and makes sure everything’s fresh.
Hit start. Go make yourself some coffee. You’ve earned it.

Step 6: Let It BREATHE

This is the prevention part. And it’s honestly the most important thing I’m gonna tell you. After every laundry day — or really, after every load if you can remember — leave the washer door open.
Just… leave it open. For a few hours. Overnight if possible.
Front-loader people: also leave that detergent drawer cracked open.
Why does this matter so much?
Because moisture = mildew. Every time. If you close the door right after washing, all that moisture is trapped inside with nowhere to go. And boom. Mildew city.
But if you leave it open? Everything dries out naturally. No mildew. No smell.
This one habit — just leaving the door open — prevents like 90% of washer smell problems.
I’m not kidding. This is the secret.

Products I Actually Use (Real Talk)

Look, nobody’s paying me to say any of this. These are just the products I actually keep in my van and use in my own house.

For monthly cleaning:

  • Affresh Washer Cleaner — My personal favorite. Works great on both front and top loaders. About $10 for a pack that lasts months. Get it at Walmart, Target, Meijer, Home Depot, wherever.
  • Tide Washing Machine Cleaner — Basically the same thing. Pick whichever’s cheaper when you’re at the store.
  • OxiClean Washing Machine Cleaner — If you’ve got mold or a really bad smell situation, this one’s stronger. Still safe for your machine though.

For the rubber gasket:

  • Dawn dish soap — The regular blue kind. Mix a little with warm water. That’s literally all you need. Don’t overthink it.

For DIY cleaning:

  • White vinegar — The cheap grocery store stuff is fine. Use it in the drum only. Never in the dispenser (can damage rubber over time). And NEVER EVER mix it with bleach.
  • Baking soda — Arm & Hammer. Good for light odors. Won’t fix major problems on its own, but it helps.

Where to buy all this:

  • Walmart, Target, Home Depot, Lowe’s, Meijer (if you’re in Michigan), or just Amazon it.
  • None of this is expensive or hard to find.

What NOT to buy:

  • Random off-brand stuff that promises miracles for $3. Stick with names you recognize. Your washer will last longer.

Mistakes People Make (Don’t Do These Things)

  • Mixing bleach with vinegar or ammonia
    This creates toxic gas. Seriously. Don’t do it. If you use bleach one day, wait until the next day to use anything else.
  • Pouring vinegar into the fabric softener dispenser
    It can damage the rubber parts in there over time. Drum only. Always.
  • Using harsh scrubbers on the inside of the drum
    Steel wool, rough sponges, anything abrasive — don’t use these inside your washer. You’ll scratch up the drum and create new places for bacteria to hide.
  • Closing the door right after washing
    We talked about this. Leave it open! This is probably the #1 cause of smelly washers I see.
  • Using too much detergent
    For real. Modern high-efficiency washers need like… barely any detergent. Check your manual. It’s probably way less than you think. More soap doesn’t mean cleaner clothes. It just means more buildup and more smell.

How to Keep It From Getting Smelly Again

Prevention is so much easier than deep cleaning. Trust me.

Every day:
leave the door open after your last load. That’s it. That’s the whole thing. Just… leave it open.

Every week:
run at least one hot water cycle. Doesn’t have to be empty. Just use hot water for something. Wipe down the rubber gasket with a dry cloth after your last load of the day.

Every month:
clean that drain filter. Put it on your calendar. First of the month = filter cleaning time. Easy to remember. Run a cleaning cycle with Affresh or Tide tablets. Pull out the detergent drawer and give it a quick clean.

Other tips that actually help:
use less detergent than you think you need. Check your manual. It’s probably like 2 tablespoons max for HE machines. Switch to powder detergent if you can. It leaves way less residue than liquid. Skip the fabric softener. I know, I know. But it’s honestly one of the worst things for buildup. If you love soft clothes, try wool dryer balls instead. If you’ve got hard water (and if you’re in Michigan, you probably do), run those cleaning tablets more often. Mineral buildup happens faster with hard water.

Special Situations (AKA: Weird Smells Explained)

Rotten egg smell / sulfur smell:
this usually means bacterial growth in standing water. Or sometimes it’s your actual water supply (sulfur in the water itself).
What to do: Clean that drain filter ASAP. Run a hot cycle with Affresh. Make sure your drain hose isn’t kinked or clogged.
If it’s still happening after that, it might be your water. You’d need to check with a plumber or water treatment person.

Mildew smell (musty, like wet basement):
This is the most common one. Almost always from the rubber gasket on front-loaders.
What to do: Deep clean that gasket (Step 2 above). Then make it a habit to wipe it down and leave the door open. Every time. No exceptions.
If your laundry room is really humid (basement, no windows), consider running a dehumidifier.

Chemical smell / gasoline smell:
Did you wash work clothes or rags that had gas or chemicals on them?
What to do: Run 2-3 empty hot cycles with baking soda. Air out your laundry room. And maybe wash really gross stuff at a laundromat next time? (Just saying.)

Questions People Always Ask Me

You’ve Got This

Okay, so we covered a LOT here. And I know it probably seems like a lot to tackle all at once. But here’s what I tell every single one of my clients: you don’t have to do everything today. Start with the drain filter. Seriously. Start there. Clean that thing out and run a hot cycle. That alone might solve your whole problem. Then if you’ve got a front-loader, tackle that rubber gasket when you have time. Run some cleaning tablets through. That’s like 80% of the battle right there.
The rest? Monthly maintenance. Little stuff. Easy stuff. Once you’ve got it clean, just keep it that way.

  • Leave the door open
  • Clean the filter once a month
  • Run a cleaning tablet every few weeks

That’s it. That’s all it takes to keep your washer from going back to stink-town.

Need actual help?
Look, if you’re anywhere in Waterford or Oakland County, and you’re thinking “Tetiana, I’d rather just pay someone to handle this” — totally fair. That’s literally what Mykola and I do every day. GoShineUp Cleaning deals with this stuff constantly. We’ve seen it all (trust me, we’ve seen EVERYTHING), and nothing grosses us out anymore. That’s what you pay us for. Give us a call if you want help. Or if you just have questions about cleaning stuff. We’re local, we’re friendly, and we actually show up when we say we will. But honestly? You can totally do this yourself. It’s not that hard once you know what to do.
So go clean that washer!

You’ll be so glad you did.

— Tetiana
GoShineUp Cleaning Services Waterford, Michigan
(The cleaning company that actually answers the phone 😊)

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