Dreame Robot Vacuum Not Washing the Mop? Here’s How to Fix It

Step-by-step fix guide | Dreame robot vacuums

Try this first — Empty and rinse the used water tank, check its seal, then press the tank down gently so it sits properly in the base station.

If your Dreame base station won’t wash the mop pads properly, or the water level in the washboard is wrong, these are the checks from Dreame’s manuals for the self-washing base stations of the X60 Pro Ultra Complete, X50 Ultra Complete, X40 Ultra Complete, Matrix10 Ultra, Matrix10 Pro, L50s Pro Ultra, L50 Ultra AE, L40s Pro Ultra, L10s Ultra Gen 3, L10s Ultra Gen 2 and D30 Ultra.

What This Problem Means

The base station washes the mop pads on its washboard and collects the dirty water in the used water tank. Dreame’s manuals say the washboard’s water level can go wrong if the used water tank’s seal is loose, the tank isn’t seated, the washboard drain is blocked or the wrong liquid is in the station.

Common Symptoms

  • The washboard water level is abnormal
  • The mop pads aren’t being washed properly
  • The mop pad holder stays raised
  • There is water under the clean water tank

Safe Checks You Can Try

1. Check the used water tank

Dreame’s manuals say to check whether the seal on the used water tank is loose or not fitted correctly, and to reset it by hand if so. Then press down gently on the tank to make sure it is installed correctly. Dreame says to clean the used water tank after the robot finishes its task, to stop smells.

2. Clean the washboard filter and drain

After the mop wash has finished, take the robot out, remove the washboard filter and check whether the drain outlet is blocked. Clean it, rinse the filter with clean water and refit it. Dreame’s tables say to clean the washboard filter every 1 to 2 months. On models with a heating module, the washboard may still be hot, so take care. On the L10s Ultra Gen 2 and X40 Ultra Complete, take out the whole washboard instead and check whether the drain is blocked. On the L10s Ultra Gen 2, open the washboard’s filter cover, rinse the washboard with clean water and clean it with the cleaning tool provided, then close the cover, wipe the washboard dry and wipe the washboard base before you put it back; its table says to do this once a month. On the X40 Ultra Complete, flip the washboard over, remove the roller cover and the roller, pull off the roller’s end caps and clear any tangled hair, refit the parts by their colours, then rinse the washboard with clean water and put it back; its table says to clean the washboard every 2 months. Its base station also cleans the washboard by itself with each mop wash, and the washboard base cleaning function in the app starts a deeper clean of the washboard base.

3. Use only Dreame’s cleaning solution

Dreame says not to add any liquid other than its officially approved cleaning solution. Fill the clean water tank with clean water, not hot water: Dreame says hot water can deform the tank.

4. Descale the heating module

The X60 Pro Ultra Complete, Matrix10 Ultra, Matrix10 Pro, L50s Pro Ultra and L50 Ultra AE have a washboard heating module that can build up scale. Dreame says to clean it every 6 months: take the robot out, wait until the module has cooled to room temperature, pour a little white vinegar (5% acetic acid) on it and clean it with a suitable tool. Don’t put vinegar or descaler in the clean water tank. The L40s Pro Ultra’s manual lists no heating module, but its clean water tank has a scale inhibitor that Dreame says to replace every 18 to 36 months.

5. Check the mop pad holder

If the mop pad holder is raised when it shouldn’t be, remove it, check for anything stuck in it and restart the robot. On the Matrix10 Ultra and Matrix10 Pro, keep the base station door closed: Dreame says opening it while the station is working can stop the mop assembly shuttle moving.

6. Water under the clean water tank is normal

When you take out the clean water tank, a little water left in the pipe can end up under the tank or around its seal. Dreame says this is normal: wipe it up with a dry cloth.

Mop and washboard care by model

Model Heating module Mop pads
X60 Pro Ultra Complete, Matrix10 Ultra, Matrix10 Pro, L50s Pro Ultra and L50 Ultra AE Descale every 6 months Replace every 1 to 3 months
X50 Ultra Complete, X40 Ultra Complete, L40s Pro Ultra, L10s Ultra Gen 3, L10s Ultra Gen 2 and D30 Ultra Not listed in the manual Replace every 1 to 3 months
D20 Pro Plus None (no mop washing) Clean after each use; replace every 3 to 6 months

D20 Pro Plus: if no water comes out

The D20 Pro Plus’s base station doesn’t wash the mop: the robot has its own water tank. If no water, or only a little, comes out, Dreame says to check there is water in the tank, clean the air hole on the water inlet lid, clean the mop pad if it is dirty, and check the mop pad and mop pad holder are fitted correctly.

When To Contact Support

If none of these checks fix it, contact Dreame’s UK after-sales team on +44 808 502 1616 (Monday to Sunday, 9am to 6pm) or at aftersales@dreame.tech, as listed on Dreame’s contact page, with your robot’s model.