Ahh right. I was hoping you were going to say something like that. If you use anything like WD40 etc, that's why you're brake'll be shit Errrmm...Try riding/pushing the bike along with the brake on, to dry up the rim, and spread all the fairy liquid round abit. One thing I found works aswell, is deodrant. Srap a bit over the rim, and any crap will literally rince (sp?) off the rim. Then just dry it, and ride Could also try a fresh grind?