You clean a dehumidifier by first unplugging it, emptying the water tank, rinsing it with lukewarm water and a little mild soap, and letting everything dry thoroughly. If you use it regularly, do this every few weeks to prevent stagnant water from developing a musty smell.
Why should you clean a dehumidifier?
A dehumidifier removes moisture from the air and collects it in a tank. The water can sometimes sit there for hours or days, especially if you rarely empty the device. Stagnant water can start to smell, and a layer of grime can build up on the tank wall. The device also collects dust that enters through the air intake.
Cleaning therefore not only prevents a musty smell in the room but also maintains performance. A dirty air intake or tank makes the device less efficient. And because Milieu Centraal says that a dehumidifier uses electricity and only provides temporary relief, you want it to work as effectively as possible. Read their explanation about ventilating your home.
Cleaning a dehumidifier: step-by-step guide
Always switch off the device completely first and unplug it. The fire service advises switching devices off completely rather than leaving them on standby, especially before cleaning them with water. See the fire service's tips on electrical appliances.
| Step | What to do? | Note |
|---|---|---|
| 1. Switch off | Unplug from the socket | Never clean while plugged in |
| 2. Empty tank | Remove the tank and empty it over the sink | Do not let it overflow |
| 3. Clean tank | Rinse with lukewarm water and a little mild dishwashing liquid; use a soft brush if necessary | No abrasives or harsh chemicals |
| 4. Exterior | Wipe with a slightly damp cloth and dry | No water in the casing or grilles |
| 5. Air intake | Carefully vacuum or brush the grilles clean | Follow the manual for removable filters |
| 6. Drying | Let the tank dry completely before replacing it | Drying prevents new smells |
If your model has a removable air filter, check the manual to see how to clean or replace it. Not all models have one, and the method varies by device.
How often should you clean a dehumidifier?
There is no fixed rule, but as a general guideline, empty the tank after each use and clean the tank and device every two to four weeks if you use it daily. If you only turn it on occasionally, empty the tank after each period and clean it before storing it away. You can safely store a dry, clean dehumidifier.
If you notice that the water or air smells musty, it is time to clean it immediately. If the smell keeps coming back, the cause may be in the room itself, such as mould. First, check where the moisture is coming from and ventilate properly.
What can you do with the collected water?
The water in the tank has condensed from the air and is not intended for drinking. There are important considerations for using it on plants or for cleaning. Read more in our article can you reuse the water from a dehumidifier.
The Dynter DH251 and maintenance
The DH251 has a 3800 ml tank and a safety sensor that switches off the device as soon as the tank is full. This makes emptying and cleaning straightforward.
Capacity: removes up to 900 ml of moisture per day
Tank: 3800 ml with a safety sensor that switches off when the tank is full
Use: suitable for rooms up to 55 m², consumes 80 W, weighs 2.5 kg
Extra features: timer from 1 to 24 hours and a night mode with the display off
Want to know more or choose a dehumidifier?
View the Dynter DH251 dehumidifier or discover the entire dehumidifier collection. Also read how much electricity a dehumidifier uses per day and whether a dehumidifier can be left on while you sleep.
Direct answer: unplug it, empty and rinse the tank with lukewarm water and mild soap, wipe the exterior and let everything dry completely. If you use it daily, do this every two to four weeks.
Frequently asked questions
Can I use vinegar or bleach?
It is best to follow your device's manual. Harsh substances can damage plastic. Lukewarm water with a little mild soap is usually sufficient.
Why does the water from my dehumidifier smell musty?
Water that sits for a long time can start to smell. Empty the tank regularly, rinse it and let it dry.
Can I put the device in the dishwasher?
No, do not put a dehumidifier or its parts in the dishwasher without checking first. Check the manual to see whether a part is suitable for this.
Should I also clean the room?
If there is mould in the room, you must also address the cause. According to Milieu Centraal, a dehumidifier provides temporary relief but does not solve a moisture problem.