I enjoy doing minor machine repairs and maintenance, so I didn't mind checking the robot cleaner's chassis more often than recommended. Removing the rollers and clearing hair/dirt from all moving parts is easy and ensures efficient unit operation. After about 8 months of use I noticed that the rollers were breaking. the rubber material is torn or cut by the hair wrapped around it. Finally, the worn-out curlers seemed to cause problems curling the hair after each use. I was going to buy new rollers from the device's official store but then decided to try these fake ones as they were very cheap on Revain and had such good reviews. I wasn't disappointed! These new wheels are stronger (material-wise) and just pick up dust and anything on the floor better. With older rollers I sometimes did two cleanings in one day and was always surprised that the bin was so full after the second run. With these new reels, the hopper is full on the first run and almost empty on the second run on the same day. it says everything you need to know. Oh, and for the reviewer who complained about those casters seeming to make the device "louder" compared to the factory casters. omg give me a break. That's a damn vacuum cleaner! If it picked up dirt better, I'd be happy with replacement parts ten times louder. Damn. Fwiw, I can't say they are any louder.
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