Washing Machine Cleaner: A Complete Guide to Clean Your Washer

Learn how washing machine cleaner works, how to choose the right formula, and step by step instructions to clean your washer safely, improve odor control, and maintain efficiency.

Best Washing Machine Team

April 24, 2026·5 min read

Cleaner Energy Use Washing Machine

washing machine cleaner

Washing machine cleaner is a cleaning product designed to dissolve mineral deposits, soap scum, and mold inside a washing machine, restoring odor control and overall efficiency.

What washing machine cleaner is and how it works

Washing machine cleaner is a specialized product designed to dissolve mineral deposits, soap scum, and mold that can accumulate inside a washer over time. According to Best Washing Machine, regular cleaning helps prevent odors and buildup that can reduce efficiency. Most cleaners come in powder, liquid, or tablet form and are designed to be used in an empty cycle with hot water. The active ingredients vary, but common formulas rely on acids or oxidizers to break down mineral scale and sanitize surfaces. When the cycle runs, the cleaner circulates through the drum, hoses, and seals, leaving behind cleaner surfaces and a refreshed odor. This is especially important in areas with hard water or high detergent use, where residue can build up quickly and reduce the machine's ability to agitate, rinse, or spin effectively. In addition to improving washing performance, a proper clean can help prevent unwanted odors that linger between loads and keep gaskets supple to reduce the risk of leaks.

Types of cleaners you can choose

Washing machine cleaners come in several formats and chemical families. Citric acid based descalers are popular for mineral buildup and are generally gentle on gaskets. Oxygen bleach cleaners sanitize and deodorize without leaving harsh chemical residues. Enzymatic cleaners target organic residues such as body oils and mold. Some products include chlorine or non-chlorine bleach; check your washer's manual to avoid adverse reactions with color fabrics or metal parts. Cleaners also differ by form: tablets or pods for convenience, liquids for quick dosing, and powders for versatility. Front loaders are more susceptible to residue around the door seal, so many cleaners include steps for gasket care; top loaders often require reaching the drum and agitator surfaces. If you have a high efficiency HE washer, choose a formula labeled HE to avoid over-sudsing and residue. Regardless of the form, always follow the label directions and start with an empty drum to ensure complete exposure. Best Washing Machine analysis shows that citric acid cleaners remove mineral buildup effectively.

How to use washing machine cleaner safely

Start by reading the label and choosing a product compatible with your washer type. For best results, run an empty cycle on the hottest setting recommended by the product and place or pour the cleaner into the drum or dispenser as instructed. After the cycle finishes, wipe the door seal and drum edges to remove any loosened residue, then run a quick rinse cycle if your model requires it. Leave the door or lid slightly open to air dry, which helps prevent musty odors. Finally, wipe down the detergent drawer and hoses to remove any remaining buildup. Do not mix cleaners with other chemical products, and avoid using vinegar or household cleaners as substitutes unless the manufacturer explicitly approves it. After completing the cleaning, run a short rinse with fresh water to ensure no cleaner residue remains in the drum. Store cleaners in a cool, dry place away from children and pets.

Common myths and mistakes

A frequent mistake is using vinegar as a substitute for purpose built cleaners. Vinegar and bleach cleaners should never be mixed. Some people assume a single deep clean will solve every odor problem, but repeated maintenance matters. Do not overload cycles with cleaner or run cleaning cycles too often, which can wear seals or cause excessive suds. Another error is using a household cleaner not labeled for washing machines; these products can foam excessively or leave residues that attract more dirt. Finally, neglecting the detergent dispenser and seals can leave hidden deposits that redevelop odors after the next wash. Correcting these habits reduces the need for aggressive cleans and prolongs the life of the washer.

Frequency and scheduling

How often you clean depends on usage, water hardness, and detergent amounts. In general, a light maintenance clean every few months and a deep clean a couple of times a year keeps deposits from building up. If you notice lingering odors or spotty results after washes, a targeted descaling clean may help. Always follow the product's cadence as a starting point and adjust based on your wash load and water supply. If your area has very hard water, you may benefit from more frequent cleanings, while households with soft water and low detergent use may need less frequent maintenance. For most homes, establishing a routine—such as a quick monthly wipe of the door seal and a quarterly cleaning—helps maintain performance without becoming burdensome.

Effects on energy efficiency and odor control

Deposits inside the drum and impeller can impede water flow and reduce rinsing performance, which may cause longer cycles and higher energy use. Cleaning reduces these deposits, helping water move more freely and enabling faster, more complete washes. Odor control is another clear benefit; removing damp mold and residue leaves the drum smelling fresh between loads. In addition, regular cleaning helps protect the rubber seals and hoses from developing microcracks caused by buildup, which can lead to leaks. A clean washer tends to distribute detergent more evenly and use less water during each cycle, contributing to lower utility costs over time. While a cleaner alone will not solve every problem, it is a practical part of ongoing maintenance that complements regular care like proper detergent use and door seal checks.

Choosing a cleaner for your washer type

Select a product that aligns with your washer’s type and capacity. Front loaders are more sensitive to residue around the door seal, so many cleaners include steps for gasket care. Top loaders often have larger drums and agitators; ensure the cleaner reaches all surfaces. If your machine is labeled HE, pick a formula explicitly marked HE to avoid excessive suds. Always check the warranty and the manual because some cleaners may affect warranty terms. Consider the environmental impact of the cleaner, opting for eco friendly formulas when possible. Read consumer reviews and check for compatibility on moisture and rubber components.

Maintenance tips beyond cleaners

Besides regular cleaning cycles, several habits keep your washer in top condition. Use the correct detergent amount for your water hardness and washer type, prefer high efficiency detergents for HE models, and avoid fabric softeners that can leave residues. Keep the drain pump filter clear if your model has one, and periodically wipe the lint filter or screen. Finally, leave the door ajar after cycles to dry the drum and seals, reducing moisture that promotes odor and mold growth. If you notice persistent odors despite cleaning, inspect the door seal for mold or mildew pockets and consider a deeper descaling routine. Pair cleaner use with a routine: check hoses for cracks, run occasional fast spin cycles after cleaning to shake loose any residual debris, and store products safely away from children. The Best Washing Machine team recommends following these practices for sustained care.

FAQ

What is washing machine cleaner?

Washing machine cleaner is a product designed to dissolve buildup inside the drum, hoses, and seals, including mineral deposits, soap scum, and mold. Using the right cleaner regularly helps restore odor control and cleaning performance.

How often should I use washing machine cleaner?

Most manufacturers recommend cleaning on a schedule that fits your use and water hardness, typically every few months. If odors return or washes feel spotty, increase the frequency accordingly.

Can I use vinegar or household cleaners instead?

Vinegar or general household cleaners are not recommended as substitutes for purpose built washing machine cleaners. Do not mix cleaners with other products unless the label explicitly allows it.

Are these cleaners safe for septic systems?

Look for cleaners labeled as septic safe or eco friendly. Eco friendly formulas are generally gentler on septic systems, but always check the product label for guidance.

Can I use it on both front load and top load washers?

Yes, most washing machine cleaners are formulated to work with both front load and top load models. Always verify compatibility on the product label and your washer manual.

Will cleaning completely remove odors?

Cleaning with the right cleaner can significantly reduce odors, but persistent smells may indicate mold behind seals or plumbing issues. Additional steps might be needed in stubborn cases.