hello everybody i purchased some koxx bloxx greens about a week ago and put a fresh grind on my rim it was working mint until Saturday then it just wasn't holding and was slipping and making no noise so i got home toke my rim off cleaned it with a cloth with white spirit on, then rinsed it with water sanded all the s**t off my pads and set them up square with the rim and it is still working rubbish. could any one give me a bit off advice please thanks alot Toby