These things don't last long. Pet hair wraps around the axle and into the bearing area, which heats up the plastic it's rubbing against, then the end cap melts along with the roller and the whole thing freezes. If you let it run too long, it will likely chew its teeth off the belt. I'm experimenting with one of these, covering all the bristles with sealant to make them not really bristles but a solid row of 'stuff'. I've noticed that Bissel does NOT wrap pet hair around his "brush" very well. just ripping instead of brushing. So the hair had nothing to catch. That's exactly what I achieve by coating the brushes with sealant. So far this seems to help a lot in preventing all the hair from winding up on the drum. He picks it up and ends up in the trash can. The time will show.