Your robot is able to both vacuum and mop at the same time when the mopping pad plate and mopping pad are installed.
Although the Roomba® 100/1000 Combo series can detect and avoid rugs/carpets, it cannot lift its pad to travel across them. Before starting a mopping job, we recommend you prepare the room by removing any rugs /carpets in the area you want to mop
Note: Your Roomba 100/1000 can vacuum and mop or just vacuum, but it cannot mop only.
IMPORTANT: Do not add liquids such as hot water, detergent, or disinfectant as they could damage the robot.
After completing your mopping and vacuum cleaning job, make sure to empty the water tank and replace the mopping pad.
Use only approved water or iRobot approved cleaning solutions as noted at 
Approved Cleaning Solutions for Mopping and Combo Robots.
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Press the bin release button to remove the bin.
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Remove the pad plate from the bin.
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Lightly dampen the mopping pad and attach it to the pad plate.
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Reinstall the pad plate on the bin.
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Fill the tank with water.
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Place the bin back in the robot.
Roomba® 100/1000 Combo
Roomba® 100/1000 Combo + Auto Empty dock
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Place the robot back on the dock and use the app or robots button to start cleaning.
NOTE: If your robot needs water in the middle of a job, tap the power button to pause. Remove the bin and add water. Reinstall the bin, and press the power button again to resume.
