When I switched to Koolstop salmon pads, I had to remove a buildup left by the Shimano's I removed. A green Scotchbrite pad and some elbow grease did the trick. For toe in, I fold a business card in half and put it under the first 1/3 of the pad (leading edge, where the rim first contacts the pad), squeeze gently, and snug up the pad mounting bolt. (I start with the bolt slightly loose). Done one side at a time, this has worked for me, and no squeeling pads.