I just installed some koolstop brake pads on the front of my new surly LHT. The rims are rhynolites and breaks are avid sigle digit five. I toed in the brake pads, cleaned the rims with windex, even sanded the rim surface a little. The problem is they are still squealing. It's not deafening, but it just bugs the hell out of me. I love it when my bike is in perfect working order but I can't stand it when it isn't. Anyone have any advice on how to fix this problem?