Why a Washing Machine Smells
A foul odor emanating from a washing machine can be an unpleasant surprise, often indicating underlying issues that require attention. Understanding the causes of these smells is essential for maintaining a clean and efficient appliance. Several factors contribute to washing machine odors, ranging from bacterial growth to improper maintenance.
One primary cause of a smelly washing machine is the buildup of bacteria and mold. Washing machines operate in a warm, moist environment, creating ideal conditions for microbial growth. Residual water left in the drum, gasket, or detergent drawer after cycles can foster bacteria and mold, especially in front-load machines where rubber seals trap moisture. These microorganisms produce musty or mildew-like odors that can transfer to clothes.
Another contributing factor is the accumulation of detergent and fabric softener residues. Over time, excess detergent can form a sticky film inside the machine, particularly in areas like the drum or hoses. This residue traps dirt, hair, and other debris, creating a breeding ground for odor-causing bacteria. Using more detergent than recommended exacerbates this issue, as the machine may not fully rinse away the excess.
Lint, hair, and small particles from clothing can also collect in the machine’s filter, drain pump, or crevices, contributing to unpleasant smells. If the filter is not cleaned regularly, this debris can decompose, releasing a foul odor. Similarly, washing items like heavily soiled gym clothes or pet bedding can leave organic matter behind, further promoting bacterial growth.
Improper usage or maintenance habits can worsen the problem. Running only cold or short wash cycles may not effectively clean the machine’s interior, allowing grime to accumulate. Additionally, leaving wet clothes in the drum for extended periods encourages mold growth and intensifies odors. Neglecting to leave the door or detergent drawer open after use prevents proper ventilation, trapping moisture inside.
To address washing machine odors, regular maintenance is crucial. Cleaning the drum, gasket, and detergent drawer monthly with vinegar or a specialized cleaner can eliminate bacteria and residue. Running a hot water cycle with a cleaning agent, such as baking soda or a commercial washing machine cleaner, helps disinfect the machine. Regularly cleaning the filter and ensuring proper ventilation by leaving the door ajar between uses can prevent odors from returning.
Washer Smells
It’s not uncommon for a washer to develop a musty or mildew smell. This can occur either in or around the appliance, and it’s an indication of mold and bacteria growth. The washer tub provides a perfect dark, moist area for mold and bacteria to thrive.
All washers develop what is called a “bio-film” which is decaying matter that’s always damp. Some washers are more prone to this build-up than others. Over time it’ll begin to smell and if left untreated, the smell can spread into your laundry. In worst case situations, it can even cause the laundry room and other nearby rooms to smell. Read our article on how to remove this odor from your washer. A good habit to develop is to clean your washing machine every month, and be on the lookout! Periodically check the area around your washer for mold or mildew. If your walls, cabinets or other areas show signs of mold or mildew growth there may be an issue with moisture that needs to be addressed.
Detergent
Too much detergent will create excessive suds and a dirty residue will build within the basket and other washer parts.
Use the correct amount of detergent and fabric softener. This is probably the best defense simply because it’s actually limiting the food supply.
Temperature
Hot water will help dissolve the layer of bio-film. A hot soak or wash on your final load can be a great preventative measure, especially if you prefer washing in cold water.
If you have a reoccurring mold problem or you don’t use your washer frequently, you can run a second rinse cycle when you’re doing laundry to help prevent mold and mildew growth.
Drain Pump Filter
The drain pump filter should be cleaned once a month, but few homeowners perform this task unless there’s a problem. Frequently coins and other small items get caught in this filter and cause the water flow to slow creating an ideal location for mold and mildew growth.
