Dock will not wash the mop (tanks + water filter)
Where to look: Mop cloth under the robot; clean/dirty tanks; water filter in the dock wash sink.
After mopping, the dock does not wash the mop. Official Ultra steps require job-started-from-dock, tank seating, and a correctly click-locked water filter — not just an app Wash tap.
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Quick answers
What is wrong?
After mopping, the dock does not wash the mop. Official Ultra steps require job-started-from-dock, tank seating, and a correctly click-locked water filter — not just an app Wash tap.
What you might notice
- Mop still dirty after docking
- No wash cycle
- Water tank warnings
Can I fix this myself?
Often yes with careful cleaning. Difficulty: medium · about 15-35 min. If unsure or it returns after parts cleaning, use mail-in repair.
What you need
- Clean water
- Soft dry cloth
Do this
- Mop wash only runs if mopping was used. Start the job from the dock; keep the dock on the app map; do not move the dock mid-clean.
- Fill/seat clean-water tank; empty/seat dirty-water tank.
- Remove the water filter, rinse it, wipe the cleaning tank, reinstall until it clicks.
- Start Wash from the app (or the dock wash control while docked).
- If wash still never starts with tanks and filter correct, request dock pump/valve repair.
Parts (only if cleaning fails)
- Mop cloth
- Dock water filter
- Dock wash pump (service)
Official references
- https://support.roborock.com/hc/en-us/articles/6569442771353-What-should-I-do-if-the-docking-station-doesn-t-wash-mop-when-robot-returns-to-dock
- https://support.roborock.com/hc/en-us/article_attachments/34928674877081