--- title: How Often to Clean Your Washing Machine's Door Seal: Monthly source: https://tended.mintbyte.app/how-often-clean-washer-door-seal description: Wipe your washing machine's door seal monthly and leave the door ajar between loads. Here's why front-loader gaskets grow mold — and how to clean them properly. --- # How Often Should You Clean Your Washing Machine’s Door Seal? August 2026 Wipe your washing machine's door seal monthly, and leave the door ajar between loads — that's the consensus across the major manufacturers, with [Whirlpool recommending a deep gasket cleaning roughly once a month or every 30 cycles](https://www.whirlpool.com/blog/washers-and-dryers/how-to-clean-gasket-on-front-load-washer.html). The gray rubber bellows around a front-loader's door is the single most mold-prone spot in the machine: it's watertight by design, which means it's also excellent at trapping water, detergent residue, and lint after the cycle ends. Give it a monthly wipe-down and a chance to air-dry, and you'll avoid the swampy smell that has launched — literally — federal class-action litigation. ## Why front-loaders grow mold in the first place A front-load washer only works because of that gasket. The door sits below the waterline mid-cycle, so the rubber bellows has to form a watertight seal — and anything that seals water in during the wash also seals moisture in after it. When the cycle ends, water pools in the gasket's lower folds along with undissolved detergent, fabric softener, and lint. Close the door on top of that and you've built a small, dark, warm terrarium. Top-loaders drain downward past the seal line and their lids don't close airtight, which is why the moldy-gasket problem is overwhelmingly a front-loader phenomenon. Low water usage makes it worse: high-efficiency machines use too little water to flush residue away, especially if you're overdosing regular detergent instead of using HE formulas. The result is a biofilm — a living film of bacteria and fungi bonded to the rubber. That matters because biofilm doesn't rinse off. Once established, it survives ordinary wash cycles and needs to be physically wiped and chemically treated, which is exactly why the monthly schedule exists: you're cleaning residue before it becomes biofilm. ## The smell has a name: Moraxella That "wet dust cloth" odor on towels that just came out of the wash isn't your imagination, and it isn't dirt. Microbiologists traced the signature laundry smell to a specific bacterium, Moraxella osloensis, which produces a compound called 4-methyl-3-hexenoic acid — described in a [2012 study in Applied and Environmental Microbiology](https://journals.asm.org/doi/full/10.1128/aem.07816-11) as a "wet-and-dirty-dustcloth-like malodor." The same study found the organism unusually tolerant of drying out and UV light, which is why the smell survives a trip through the dryer and comes roaring back the moment the fabric gets damp again. Your machine is also a genuinely busy microbial habitat beyond the smelly stuff. A [2015 study in Frontiers in Microbiology](https://pmc.ncbi.nlm.nih.gov/articles/PMC4672060/) sampled household washing machines and found them exchanging skin bacteria and water-borne, biofilm-forming genera between the machine and every load of laundry. None of this means your washer is dangerous — most of these organisms are harmless — but mold growing on the gasket does shed spores, and mold spores are a well-established allergy and asthma trigger. For most households it's a nuisance; if someone in yours has mold allergies or asthma, the monthly wipe stops being optional. ## How to actually clean the gasket Open the door and peel back the rubber folds — the mold hides in the creases, not on the visible surface. Remove any lint, hair, coins, and the occasional fossilized sock. Then wipe the entire circumference of the seal, inside the folds, with your cleaning solution, and dry it with a clean cloth when you're done. Which solution? Check your manual, because the manufacturers genuinely disagree. [Whirlpool recommends](https://www.whirlpool.com/blog/washers-and-dryers/how-to-clean-gasket-on-front-load-washer.html) a solution of 3/4 cup liquid chlorine bleach in 1 gallon of warm water for mildew stains, applied monthly or every 30 cycles. [LG, by contrast, tells owners to avoid chlorine-based and acidic cleaners](https://www.lg.com/us/support/help-library/lg-front-loader-how-to-clean-the-tub--20154844878056) — that rules out vinegar too — because they may cause discoloration or corrosion inside the machine, and recommends oxygen-based washing machine cleaners instead. [Samsung splits the difference](https://www.samsung.com/us/support/answer/ANS10003197/), reserving bleach for machines that already have an established mold smell. The safe generic advice: use whatever your manufacturer blesses, dilute it, and never mix bleach and vinegar, which produces chlorine gas. While you're there, pull out the detergent dispenser drawer and rinse it — it grows the same gunk for the same reasons — and run the machine's tub-clean cycle. LG's guidance is to run Tub Clean every 30 washes; Samsung says Self Clean at least monthly. For most households, 30 cycles and one month are roughly the same interval, which is why "monthly" is the schedule worth remembering. ## The mold problem was bad enough to reach the Supreme Court If a monthly cleaning schedule for a rubber ring sounds fussy, consider that front-loader mold generated some of the most-watched consumer litigation of the 2010s. Owners of early Whirlpool and Kenmore front-loaders sued over machines that developed persistent mold and odor no amount of cleaning would fix; per [Slate's coverage of the case](https://slate.com/news-and-politics/2013/07/whirlpools-moldy-washing-machines-americas-most-important-class-action-lawsuit.html), Whirlpool logged roughly 23,400 odor and mold complaint calls over eight years, and the class-certification fight went all the way to the U.S. Supreme Court, which sent it back down for another look. (A jury ultimately sided with Whirlpool in the 2014 Ohio trial.) LG chose to settle. In 2016 it [agreed to pay owners](https://www.consumerreports.org/washing-machines/lg-settles-front-loader-washer-mold-lawsuit) of roughly 700,000 to 800,000 front-loaders sold from 2002 to 2006 either $35 cash or a $105 rebate toward a new machine, while denying wrongdoing. The telling detail is what LG changed afterward: a door magnet that holds the door slightly open for air circulation, a redesigned antimicrobial gasket with drain holes, and a high-powered Tub Clean cycle. In other words, the engineering fixes for a billion-dollar legal headache were the same three things this guide is asking you to do by hand. ## Prevention beats scrubbing The single highest-value habit costs nothing: leave the door ajar between loads. Every manufacturer says some version of this — [Samsung's guidance](https://www.samsung.com/us/support/answer/ANS10003197/) is to leave both the door and the detergent drawer open so moisture can't linger long enough for mold to form, and LG sells magnetic door props for exactly this purpose. If small children or curious pets make an open washer door a hazard, at minimum wipe the gasket dry after your last load of the day. Detergent discipline does the rest. Use HE detergent in an HE machine, and use less of it than feels right — excess suds leave the film that mold feeds on. Skip fabric softener or use it sparingly for the same reason. Move wet laundry to the dryer promptly rather than letting it sit sealed in the drum, and run the hot tub-clean cycle monthly to flush residue from the parts you can't reach with a cloth. ## Signs you've waited too long Two symptoms mean the gasket needs attention now, not at the next scheduled cleaning. The first is smell: if freshly washed clothes come out with a musty, sour, or wet-towel odor, the machine is re-inoculating your laundry on every cycle. (If your [freshly changed sheets](https://tended.mintbyte.app/how-often-change-bed-sheets) smell musty out of the dryer, this is where to look.) The second is visual: peel back the gasket folds and look for black or dark-gray speckling in the creases. Light staining usually wipes away with the bleach or oxygen-cleaner treatment above; mold that has penetrated deep into the rubber and won't scrub out means the gasket itself should be replaced — it's a standard repair part on every major brand. ## What about top-loaders? Top-loaders mostly get a pass on the gasket problem — there's no watertight bellows for water to pool in, and the lid doesn't seal the drum into a humidor. But they're not immune to residue: detergent film and scrud (the technical-adjacent term for the waxy detergent-softener buildup) still accumulate on the tub, and [LG's top-loader guidance](https://www.lg.com/us/support/help-library/lg-top-load-washing-machine-how-to-clean-the-tub--20154844916474) calls for the same tub-clean cycle on the same monthly-ish cadence. So the schedule is simple either way: front-loader owners wipe the gasket and run a tub clean monthly; top-loader owners just run the tub clean. It's one of [the 97 recurring home jobs](https://tended.mintbyte.app/the-full-home-maintenance-calendar) that most checklists omit — and your nose will confirm whether you're on track. --- ### References 1. Whirlpool. How to Clean the Gasket on a Front Load Washer. [whirlpool.com](https://www.whirlpool.com/blog/washers-and-dryers/how-to-clean-gasket-on-front-load-washer.html) 2. LG USA Support. [LG Front Loader] How to Clean the Tub. [lg.com](https://www.lg.com/us/support/help-library/lg-front-loader-how-to-clean-the-tub--20154844878056) 3. Samsung Support. How to clean your Samsung washer. [samsung.com](https://www.samsung.com/us/support/answer/ANS10003197/) 4. Kubota, H., et al. (2012). Moraxella Species Are Primarily Responsible for Generating Malodor in Laundry. *Applied and Environmental Microbiology, 78*(9), 3062–3068. [doi:10.1128/AEM.07816-11](https://journals.asm.org/doi/full/10.1128/aem.07816-11) 5. Callewaert, C., et al. (2015). Bacterial Exchange in Household Washing Machines. *Frontiers in Microbiology, 6*:1381. [frontiersin.org](https://pmc.ncbi.nlm.nih.gov/articles/PMC4672060/) 6. Consumer Reports (2016). LG Settles Front-Loader Washer Mold Lawsuit. [consumerreports.org](https://www.consumerreports.org/washing-machines/lg-settles-front-loader-washer-mold-lawsuit); Slate (2013). Clean Sweep: Whirlpool's moldy washing machines. [slate.com](https://slate.com/news-and-politics/2013/07/whirlpools-moldy-washing-machines-americas-most-important-class-action-lawsuit.html) ### Related guides - [How Often Should You Clean Your Dishwasher Filter?](https://tended.mintbyte.app/how-often-clean-dishwasher-filter) - [How Often Should You Change Your Bed Sheets?](https://tended.mintbyte.app/how-often-change-bed-sheets) - [How Often Should You Clean Your Dryer Vent?](https://tended.mintbyte.app/how-often-clean-dryer-vent) --- ## About Tended Tended is an iOS app that ships with a researched catalog of 241 recurring maintenance items across six areas of life: home, health, digital, car, supplies and finances. Every item carries a recommended interval and the reason it matters, and most cite a named source. The intervals quoted on this page come from that catalog. Setup is a short conversation: you pick the part of life to start with and answer up to seven questions about it, and the app spreads the items that apply across the next twelve months. $39.99 a year with the first month free, or $6.99 a month. iPhone, iOS 26 or later. https://tended.mintbyte.app