Best for Solution / Liquid system
Roomba Combo j9+ Robot Vacuum & Mop
4.5 feature score
Highest scored product for this feature based on supporting review evidence.
Best iRobot Robotic Vacuums for Solution / Liquid system
Solution / Liquid system Decision Dashboard
Safest pick
Roomba Combo j7+ Robot Vacuum & Mop
4.2 feature score
Balances feature score, supporting reviews, and overall product strength.
Most evidence
iRobot Roomba J5+ Combo Vacuum & Mop
4 supporting reviews
Has the broadest review evidence for this feature.
Best overall product
iRobot Roomba Combo i5 Robot Vacuum
3.9 overall score
Strongest overall product among items with scored evidence for this feature.
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The liquid system was praised for a large reservoir stored neatly in the redesigned base.
Pros: Pet-Ready Features, Tool-change simplicity
Cons: Stair Cleaning, Build quality and durability
The liquid system was liked for adjustable flow and compatible cleaning solutions, though it stays manually maintained.
Pros: Mop lifting system, Area Rug Handling
Cons: Bin and Bag, Self-cleaning cycle
Reviews mention mopping with water or approved cleaning solutions, and one review notes that using unauthorized solutions may risk warranty coverage. Owners manually fill and empty the combo bin.
Pros: Build quality &, durability
Cons: Mop lifting system, Cord management
The liquid system uses little water, which can be positive, but reviewers also criticized the lack of an automatic soap dispenser.
Pros: Hair Pickup — Hard Floors, Carpet — Medium-Pile Pickup
Cons: Heating element, Kid-friendliness
The liquid system is limited by water-only mopping and no detergent, though one owner liked that it uses an electric pump instead of passive dripping.
Pros: Ease of use, Accessories and Tools
Cons: Innovation compared to competitors, Area Rug Handling
The liquid system is a major weakness, with leakage, seepage, and no water-flow control repeatedly criticized.
Pros: Pet-Ready Features, Ease of use
Cons: Self-cleaning cycle, Dock noise