Los1Fan, I just had the same problem as you did a few weeks ago. New carpet and thrashed bearings. Unlucky for me I checked my bearings after a big two day race and they were full of carpet fuzz. I removed both sides of the bearing shields, cleaned them thoroughly and hadn't had a problem since. They're spinning like they were brand new. I would try to keep a closer look on them from time to time since the shields are gone. Other than that they'll be o.k.