I was wondering why my Roomba isn't picking up all dog hair like it normally does. It left lumps everywhere and made more mess than it cleaned! I took out the casters I bought as part of this set only to find that the patterns on the casters were facing the OPPOSITE direction of what Roomba said they should be. myself. (And you can't remove the "sleeve" of the pattern to turn it the other way or put in rollers due to the nature of the handles. Don't waste your money.