Solution / Liquid system

The S10 Ultra’s WaterRecycle system is a standout, automatically reclaiming and purifying water so that in humid environments it can run many mopping cycles without any manual filling or dirty tank emptying by the owner.

Reviews describe the S1 Pro’s liquid system as sophisticated, with separate clean and dirty tanks, automatic detergent dosing, and ozonated water feeding the roller so floors are washed with fresh solution while used water is captured hygienically.

Its dock-based liquid system washes the mop pads with hot water, refills the internal tank, and works with cleaning solution, so owners mainly need to occasionally refill the clean tank and empty the dirty one rather than manage mopping manually.

An automatic water control and tank system fine tunes moisture on the roller, keeps clean and waste water separate and lets the dock refill and drain the robot’s tank so floors are cleaned without over-wetting or puddles and with minimal manual handling.

The dock automatically washes mop pads with hot water, refills the tank, and adds detergent while monitoring dirty water, giving the P10 Pro Ultra an advanced liquid-handling system.

An onboard electric tank feeds clean water during mopping, with well controlled flow that improves stain pickup on hard floors.

The WashG1 runs effectively on plain room-temperature water but also allows small amounts of non-foaming cleaners like vinegar or disinfectant in its dual-tank system, so owners can get strong cleaning without dedicated detergent while keeping clean and dirty liquid separated.

A separate soap tank automatically doses cleaner into the water stream, with adjustable ratios, on/off control, and a low-level indicator; several reviewers like that a full detergent fill can last weeks, reducing the need to measure and mix solution each refill.

Sprays cleaning solution immediately without finicky priming, delivering a strong, wide fan pattern; the trigger allows steady spraying while scrubbing; fill lines support mixing the right amount for small vs large messes.

Ecovacs’ solution and water system on the X8 Pro Omni automatically mixes cleaning fluid from a dedicated detergent compartment with a generous clean water supply, feeds the roller with fresh liquid while collecting dirty water into an internal tank, and owners including those with wood floors report consistently dirty waste water and no damage when the mop and wheels are kept free of grit.

The dock automatically refills the onboard water tank and can trigger extra pad washes based on dirty-water sensing, while owners add cleaning solution directly to the clean-water tank when they want detergent mixed in.

With the optional water line refill kit, the X50 Ultra’s dock can automatically top off its clean water tank to keep up with the robot’s heavy water use for mopping and pad washing, making the already advanced liquid system even more hands-off for owners who are willing to install the kit.

System automatically dispenses clean solution and returns dirty water to the tank for easy operation.

Its multi-tank system mixes Roborock cleaning solution with clean water, feeds an internal tank to keep pads wet, and routes used water into a dirty tank that is easy to dump.

Reviewers note that the Z70’s dock has an integrated detergent reservoir and liquid handling system that works well in practice and simplifies using cleaning solution for mopping.

The Auto-Fill dock holds a large clean-water reservoir (often framed as about 30 days) and can top up the robot mid-job; some find the reservoir shape wide/awkward to carry and recommend using approved cleaning solutions.

The automatic solution system mixes a pet and child safe cleaner into the water and can last about a month per fill, noticeably boosting cleaning performance, though several owners find the small, awkwardly positioned tank hard to access, sometimes needing to lay the machine flat to refill it.

Automatically dispenses cleaning solution at a well-regulated, relatively low flow whenever the machine is on, so you do not need to hold a trigger and you avoid over-wetting floors.

A dual-tank system keeps clean and dirty water separate while a debris filter in the dirty tank traps hair and solids, so floors are always washed with fresh solution and routine emptying and waste handling are less unpleasant with fewer refills, and owners find it easy to add water and detergent using clear fill markers and can switch to stronger disinfection mixes when needed, although Ultenic’s own detergent can still be hard to buy so some simply run the machine with clean water instead.

Trigger-controlled water and solution delivery gives precise control over how much liquid hits the floor, which some users prefer to fully automatic systems.

The S14 Plus dock manages clean and dirty water tanks for the roller mop and automates refills, though it omits the automated detergent mixing found on its Ecovacs twin.

Users like the simple solution system, with clear water and formula lines on the tank and the option to add Fresh Start solution in the base, which smells pleasant and helps keep the internal plumbing clean.

Uses a concentrated solution with a Clean Boost option that outputs extra liquid for tougher spots, and owners note it can put down noticeably more solution than the CrossWave while costing about half as much per bottle, though the scent is more like a generic commercial cleaner.

Auto-refill supports water or solution mixes and works reliably during runs.

Its dual tank system, with water and Deep Clean Pro in the main reservoir and an oxy booster for tough spots, automatically mixes solution and feeds a powerful spray that helps break up stains, but that high pressure spray can soak carpets quickly, burn through concentrate faster than some rivals and often calls for extra water only extraction passes to keep formula costs in check.

Automatic solution dispensing keeps operation simple and leaves floors smelling fresh, and most floors dry quickly, though users cannot adjust the moisture level or switch to a vacuum-only mode and some are frustrated by the reliance on Shark’s own solution and its refill availability.

The dock includes a cleaning-solution system, but multiple reviewers note detergent may be used mainly during mop-pad washing rather than being mixed into the water applied to floors. The robot can change behavior around liquids (such as lifting brushes) to avoid spreading wet messes.

The dock supports detergent/cleaning-solution dispensing, which can boost cleaning, but proprietary refills add cost and using unapproved DIY solutions may risk warranty or performance.

Uses a proprietary Kenmore solution with four capfuls per tank; the system dispenses automatically and sips solution slowly, though pouring it into the tank opening can be a little fiddly.

The CrossWave uses a proprietary cleaning solution that many people like for its fresh scent, but it offers limited dwell time on tough spots and the need to keep buying Bissell-branded fluid can make ongoing use a bit more expensive, leading some users to pre-spray with other cleaners and run plain hot water in the tank; heavy-use households also report going through the solution quickly, which can further increase running costs.

Automatic solution mixing is absent, so users must pre-mix detergent and water themselves, a small step back from the Dyad Pro’s integrated solution tank.

Automatic solution mixing is absent, so users must pour and mix detergent themselves despite the vacuum’s premium positioning.

It lacks automatic solution mixing, but at its relatively low price most reviewers see manual dosing as a reasonable compromise.

Designed for water-only mopping; multiple reviewers wish it supported adding floor cleaning solution for extra cleaning power.

There is no automatic solution-mixing system, so users must manually add detergent, which feels like a missed opportunity at its premium price.

There is no automatic solution-mixing tank, so owners must manually dose cleaner even though the wash system otherwise delivers strong hard-floor performance.

Automatic solution mixing is not included, requiring users to dose detergent by hand despite the model’s premium positioning.