New belt moulding causes scratches on window!!!

I just bought a new belt moulding for my MR2 Sw20 the rubber bit that runs along on the outside between car handle and window. I was so overwhelmed when I bought and fix it cause my old one has already shown the metal side of it, the rubber was peeling etc. When I rolled up my window aaarghh to my dismay my window was heavily scratched all over on the outside . Windows are initially in mint condition. No scratches no pits etc. Where does this goes wrong? was the bushes and felt of the new belt moulding have particles that I could not see with the naked eye. Or was it still new and too tight therefore the bushes rubs and cause the scratches?! I am very upset about this Hais... I just got the car, trying to fix up bits and pieces here and there and this happen. Any ideas guys??? Please help.. .