We love our Roomba. I use this all the time. However, the constant running, being run over toys and (mostly) the many long hairs it had picked up over the years meant that the casters on the underside were wearing out. I've cleaned them many, many times over the years, but only recently have I found that I can replace them. (Bulb moment!) I ordered these replacement parts from Roomba shortly after my last haircut. As soon as they arrived I replaced everything except the red one (I don't know what it is and I didn't get the instructions... ๐คท๐ผโโ๏ธ). Plus a good wipe and my Roomba is practically new. I've definitely noticed that it cleans up better now and runs with fewer bugs.