Does a robot vacuum wash its mop with hot water?
Short answer
Yes. Several docks now heat the wash water, from 149°F (65°C) on the Dreame L40 Ultra to up to 212°F (100°C) on the Roborock Saros 20, and then dry the mops with warm air.
Which robots can do it?
- Dreame L40 UltraYes
Dreame says the L40 Ultra's base station cleans the mop and washboard with water of up to 149°F (65°C), then dries the mops with hot air.
Good to know: Dreame Lab figure at about 73°F room temperature.
- iRobot Roomba Max 705 ComboYes
iRobot says the Roomba Max 705 Combo mops with heated mopping and its AutoWash dock does heated drying.
Good to know: iRobot's page names no water or drying temperature.
- Roborock Saros 10RYes
Roborock says the Saros 10R's dock washes the mops with 176°F (80°C) water and dries them with 131°F (55°C) warm air.
Good to know: Roborock's own testing at room temperature.
- Roborock Saros 20Yes
Roborock says the Saros 20's dock washes the mop pads with water heated up to 212°F (100°C), then dries them with 131°F warm air.
Good to know: Roborock's own testing at standard air pressure; it notes the temperature varies with conditions such as altitude.
Why it matters
A mop that's rinsed in cold water and left damp in the dock picks up grease and starts to smell, which is the main complaint about vacuum-mop combos.
Not proven yet
Whether hotter water actually gets mops cleaner in a real home. The temperatures here are the makers' own figures, measured at the dock under their test conditions; none of these sources tested them independently.
How we know (4 sources)
US Saros 20 page (read Oct 25, 2026): the RockDock washes the mop pads with water heated up to 212°F (100°C) and cleans itself with hot water, then dries the mops and dock with 131°F (55°C) warm air. Roborock says the 212°F figure comes from its own testing at standard atmospheric pressure, and actual temperatures vary with conditions such as altitude. The mops detach for vacuum-only or carpet-first runs.
Read the sourceUS Saros 10R page (read Oct 24, 2026): AdaptiLift chassis crosses thresholds up to 1.57 inches (about 4 cm), including double-layer thresholds. Roborock says, based on its own testing, the mops lift up to 22 mm when the chassis is lifted. Dual anti-tangle system with a DuoDivide main brush that Roborock says ensures a 0% hair tangling rate. StarSight 2.0 navigation and VertiBeam lateral obstacle avoidance. Re-read Oct 25, 2026: the dock washes the mops with 176°F (80°C) hot water and cleans itself with hot water, then dries the mops with 131°F (55°C) warm air; Roborock says the temperatures come from its own testing at room temperature.
Read the sourceUS Dreame L40 Ultra page (read Oct 24, 2026): $799.99. Mop lifting height 10.5 mm (0.4 in), and it lifts or removes the mops to keep carpets dry; crosses obstacles up to 0.86 in (22 mm), per Dreame's lab. 11,000 Pa suction; works with Alexa, Siri and Google Home. An anti-tangle TriCut brush is sold separately. Re-read Oct 25, 2026: the base station cleans the mop and washboard with hot water of up to 149°F (65°C), per Dreame Lab at about 73°F room temperature, and dries the mops with hot air.
Read the sourceiRobot's Roomba Max 705 Combo page (read Oct 24, 2026): $1,299.99 with AutoWash dock. Anti-tangle dual rubber brushes for dirt and pet fur; heated mopping with a PowerSpin roller mop. iRobot says the robots recognize objects including cords, socks and pet waste and navigate around them. Works with the Roomba Home app and home assistants. Re-read Oct 25, 2026: the AutoWash dock handles heated drying, auto-emptying and self-cleaning; the page names no water or drying temperature.
Read the source
Status timeline
No status has changed since we started tracking. Every entry is dated and backed by the sources on this page.
- First recorded: In storesiRobot Roomba Max 705 Combo
iRobot says the Roomba Max 705 Combo mops with heated mopping and its AutoWash dock does heated drying.
- First recorded: In storesDreame L40 Ultra
Dreame says the L40 Ultra's base station cleans the mop and washboard with water of up to 149°F (65°C), then dries the mops with hot air.
- First recorded: In storesRoborock Saros 10R
Roborock says the Saros 10R's dock washes the mops with 176°F (80°C) water and dries them with 131°F (55°C) warm air.
- First recorded: In storesRoborock Saros 20
Roborock says the Saros 20's dock washes the mop pads with water heated up to 212°F (100°C), then dries them with 131°F warm air.