I really like the way this roll gets the floors done, but I have been a bit on the forgetful side, and had not replaced it for quite a while, and was wondering why the floor was still a bit wet. Well, there were 2 things. Not only had I not replaced the roller (I do try to get every single use from them) I had not replaced the filter in goodness knows how long - naughty me and the floor was not as dry as it usually is.
After replacing them both, I am back to happy again. This unit is wonderful.