Expert Tips: How to Properly Clean Your Dehumidifier Before Winter Storage

In the warmer seasons, dehumidifiers play a crucial role in enhancing air quality and comfort, particularly in humid climates or poorly ventilated spaces. However, as you prepare your home for fall, it’s tempting to simply store the appliance away. Cleaning it beforehand is essential, and here, experts share why a thorough cleaning is necessary and how to do it properly.

The Importance of Cleaning Your Dehumidifier

Cleaning your dehumidifier before storing it for the season might feel like an extra chore. Since it won’t be in use for months, you might wonder why it’s even necessary.

“Consider it a way to give your dehumidifier a rest after months of heavy use,” explains Forrest Webber, a professional cleaner. “Skipping this step can lead to mold, mildew, and bacteria thriving inside the unit.” Neglecting to clean it now means you’ll face unpleasant odors when you turn it on again. Plus, cleaning it at the end of the season is far more practical than waiting until you need it again.

Sergey Nikolin, an HVAC technician and electrician, shares the same sentiment: “A thorough cleaning ensures your dehumidifier runs efficiently when you need it most, making seasonal changes much more comfortable.”

A Step-by-Step Guide to Cleaning Your Dehumidifier

Step 1: Power Down and Disconnect Your Dehumidifier

Always ensure your dehumidifier (or any appliance) is turned off and unplugged before cleaning. This step is vital for safety, as it prevents electrical shocks, especially since water will be involved. Nikolin notes that powering down also allows the unit to reset. “Shutting it off not only avoids shocks or damage but also lets internal parts cool, making the cleaning process more effective.”

Step 2: Disassemble the Unit

Once unplugged, proceed to remove the filter and water tank. If you’re uncertain about the process, refer to the owner’s manual or take a photo for reference. “Most dehumidifiers feature a filter that’s simple to slide out,” Webber explains.

Be cautious, as disassembling and cleaning certain components, such as the coils, may void the manufacturer’s warranty. In such cases, it’s advisable to hire a professional HVAC technician.

Step 3: Wash the Filter

Begin by using a vacuum with a brush attachment to gently clean the filter. “This approach effectively removes loose debris without water, which can be better for fine particles,” Nikolin advises. Afterward, rinse the filter under lukewarm water. “For heavily soiled filters, a small amount of mild soap works well, but steer clear of harsh chemicals,” Webber adds.

For tougher dirt, Nikolin recommends sprinkling a thin layer of baking soda on the filter before rinsing. Alternatively, enzyme-based cleaners made for HVAC filters can be used. “These are particularly effective at breaking down organic matter like mold and dust,” Nikolin explains. Once cleaned, allow the filter to air-dry fully before reinstalling it.

Step 4: Wash the Water Tank

Start by emptying any remaining water from the dehumidifier’s tank. Fill it with warm water and a mild soap solution, then use a sponge or soft cloth to clean the inside. Rinse the tank thoroughly after removing the soapy water.

Next, mix one part 3% hydrogen peroxide with two parts water. Pour this solution into the tank and let it sit for 30 minutes to tackle stubborn stains or buildup. Swirl the solution around to ensure thorough cleaning and disinfection without leaving strong odors, as Nikolin suggests. Finally, empty the solution, rinse the tank, and let it air-dry completely before reassembling.

Step 5: Maintain the Fan Blades

Before cleaning the fan, inspect the blades for any damage, as Nikolin advises. If you notice chips or cracks, consider replacing the fan before proceeding. If the fan is intact, begin by using a vacuum with a brush attachment to remove loose dust and debris. “For tight spots, a can of compressed air works well to dislodge dust and dirt,” Nikolin recommends.

Afterward, use a brush or cloth to finish dusting the fan blades. “For stubborn grime, a damp cloth can be used, but avoid wetting the motor,” Webber cautions. Ensure the blades are completely dry before reassembling.

Step 6: Wipe Down the Exterior

Clean the outside of the unit with a damp cloth and mild soap, “focusing especially on the vents, which tend to accumulate dust,” Webber highlights.

Once cleaned, “use a microfiber cloth to dry the surfaces and avoid water marks,” Nikolin advises. After the exterior is dry, you can either turn the dehumidifier on or store it as required.

Cleaning Frequency for Your Dehumidifier

Webber suggests cleaning the dehumidifier every few weeks when it’s in use. This doesn’t always require a thorough deep clean. Instead, “inspect the filter, rinse the tank, and wipe down the exterior,” Webber explains.

For deep cleaning, Nikolin recommends doing it every three months or following periods of heavy use. However, if you reside in a dusty or highly humid environment, “you may need to clean it more often, both lightly and deeply, to maintain optimal air quality,” Nikolin adds.