Empty the liquid from the dehumidifier water basket into your sink or down a drain. Fill the water basket half full with clean water. Add a teaspoon of dish soap for every gallon of water used. Swish around the water inside the water basket to loosen the mold and debris.Click to see full answer. Just so, what is the black stuff in my dehumidifier?Black mold growth can hide inside of water collection tanks on dehumidifiers. Obviously, it is wet inside these tanks, so all it takes is some dust particles and one mold spore to start a contamination problem.One may also ask, how do you clean a dehumidifier tank? All of that moisture from the air ends up in your dehumidifier bucket (unless you’re pumping the water directly into a separate drain). That means it can get dirty fast and needs to be cleaned roughly once every three weeks during frequent use. Add mild liquid soap and water to the bucket. Then scrub gently and rinse. Consequently, do dehumidifiers spread mold? When dehumidifiers are set to remove enough moisture so the humidity level drops below 50-60%, the mold spores are unable to grow and spread. If this level of humidity is regulated for a certain about of time (approximately 1 week), the spores will be deprived of moisture and everything should air out.What is the best dehumidifier for mold? The 4 Best Dehumidifiers For Mold The Best For The Entire House: Ivation 50-Pint Energy Star Dehumidifier. Ivation 50-Pint Energy Star Dehumidifier. The Best For The Basement: hOmeLabs 30-Pint Energy Star Dehumidifier. The Best For The Kitchen: Afloia Electric Dehumidifier. The Best For Bathrooms And Closets: Pro Breeze Electric Mini Dehumidifier.