How well does the Roborock Saros 20 clean floors?

The Saros 20 performs excellently, achieving an "8 out of 8 pass" in the reviewer's tests. It demonstrated strong vacuuming of large particles like Cheerios and dirt, and its mopping system effectively cleaned soy sauce and dried-on stains by applying increased downward pressure when needed. The auto-empty dust bin also works very well, leaving the bin empty and the filter clean after each cycle.

What are the biggest downsides of the Roborock Saros 20?

One notable downside is that the robot did not always initially identify all stains, such as muddy paw prints, relying instead on subsequent re-mopping events after returning to the base. Additionally, while its threshold climbing worked after a remapping, it was described as "aggressive" and "not the most graceful." The warm water used for mopping also cools down quickly once applied to the mop pads.

How does the Roborock Saros 20 handle low furniture and obstacles?

The Roborock Saros 20 shines in its ability to navigate under low furniture, being only 3.1 inches tall. It effectively cleans under objects without needing to raise or lower its lidar sensors. Its obstacle avoidance system is generally very good, successfully avoiding fake poop, toys, and long cables, though the reviewer noted it did slightly push a sock during one test.

How effective is the Roborock Saros 20's AI stain detection and cleaning?

The AI detection works well for identifying certain stains like liquid soy sauce, prompting the robot to lift its front end and apply 13 newtons of downward pressure for more effective cleaning. It can also identify dry dirt, which increases suction power. However, it sometimes misses identifying other stain types, such as muddy paw prints, requiring the robot to rely on subsequent cleaning passes.

Just A Dad Approved's Roborock Saros 20 Review

Q: Does the Roborock Saros 20 use hot water for mopping?

The Roborock Saros 20 uses "warm water" for mop washing and tank refilling, not "hot water." The reviewer observed that the mop pads do get hot initially after washing at the base station. However, the internal water tank does not keep the water warm, so the water sprayed onto the pads cools off quickly during the cleaning cycle.

Roborock · Smart Home · Reviewed by Just A Dad Approved · Published 2026-04-26

Rating 5/5Source quality 100/100Evidence 15Claims 9Q&A 7Pros 9Cons 5Smart HomeIndependent creator

Based on a review by Just A Dad Approved (accessed 2026-04-26).

This page converts Just A Dad Approved's review of the Roborock Roborock Saros 20 into structured evidence — timestamped claims, pros & cons, and buyer questions. It is not the original review and does not replace watching or reading the full source.

Product Evidence hub pending. This is currently the only analysed source for this product. A full evidence hub becomes available once a second qualifying source is processed.

Source verdict

The reviewer concluded that the Roborock Saros 20 is a "really good robot vacuum cleaner" that earned an "eight out of eight pass" in his tests, performing the best among the models he tested. He particularly praises its ability to clean effectively under furniture and its strong mopping performance on dried stains, though he notes the AI sensor could be slightly better and threshold climbing is aggressive.

About this source

This review provides an "advertising versus reality" test of the Roborock Saros 20 robot vacuum and mop. The reviewer evaluates its AI sensor, obstacle avoidance, vacuum performance on large particles, corner cleaning, and mopping system, including hot water mop washing and stain removal.

Review notes

The Roborock Saros 20 is an excellent robot vacuum and mop, earning an "8 out of 8 pass" for its comprehensive cleaning capabilities. It notably lifts its front end to apply extra downward pressure for tough liquid stains and excels at navigating under low furniture thanks to its 3.1-inch height and fixed lidar sensors. While its obstacle avoidance is generally strong, it did slightly push a sock, and threshold climbing, though functional after remapping, is not always graceful. If you have a home with low furniture and require robust vacuuming and mopping, this robot is a strong contender. However, if you have many high thresholds or expect flawless obstacle avoidance with very light items, you might want to consider alternatives.

What the reviewer liked

Lifts front end to increase downward mop pressure for tough liquid stains
Excellent obstacle avoidance for fake poop, toys, and long cables
Very good at going under low furniture (3.1 inches tall) and cleaning effectively
Increased suction power automatically for detecting dry dirt
Warm water mop washing makes mop pads very hot at the base station
Auto-empty dust bin works really well, leaving the bin empty and filter clean
Good corner cleaning capabilities for vacuuming and mopping
Threshold climbing works after remapping the home
AI sensor identifies stain types and adjusts cleaning methods

What the reviewer criticised

Did not identify all stains (e.g., muddy paw prints) initially, relying on re-mopping events
Side brush turns off in corners during mopping, which is 'kind of weird'
Moved a sock during obstacle avoidance, indicating it's 'not perfect'
Threshold climbing is 'aggressive' and 'not the most graceful'
Warm water cools off quickly after being sprayed on mop pads during cleaning

Structured claims

The robot can detect dirty areas and automatically boost suction power in a crisscross pattern, even in custom cleaning modes, though its detection for all dry debris might be inconsistent.

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The Roborock Saros 20 can lift its front end to increase downward pressure on the mop pads for tough stains, potentially achieving up to 13 newtons as advertised, a feature observed and praised by the reviewer.

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The 3.1-inch tall Roborock Saros 20 excels at cleaning under low furniture, navigating completely underneath and effectively cleaning all the way to the wall, a significant highlight of its performance.

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The robot demonstrates good obstacle avoidance, successfully navigating around objects like fake poop, toys, and cables, though it may slightly push lighter items such as socks.

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The base station provides warm water for mop washing and internal water tank refilling, however, the reviewer notes that the water cools quickly once applied to the mop pads and is not truly 'hot'.

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The robot performs an excellent job of cleaning dried-on stains like soy sauce, leaving the floor very clean after mopping.

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The Roborock Saros 20 can climb thresholds, but it may require remapping the environment for optimal performance and its approach is described as aggressive compared to other models.

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While Roborock claims 100% corner coverage for vacuuming, the actual performance is 'pretty close' but may still leave small particles like Cheerios in the very corner.

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The robot's dry vacuuming performance on large particles like Cheerios and general dirt is 'not too bad' but may leave 'quite a bit' of debris in some areas.

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Evidence items

Test Overview & AI Sensor Focus

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The reviewer introduces the 'advertising versus reality' test for the Roborock Saros 20, stating it will check the AI sensor's ability to pick up soy sauce, large particles, and muddy paw prints, along with corner cleaning and hot water mop washing.