My Cr10 S5 has been cleaned, but cleaning only does so much. It needs new belts, and I also might have to replace a gear/motor. When the tip presses against the glass during auto-home, I hear a grinding noise. I believe a gear has been chewed up and the printer can no longer provide the pressure needed during the auto-home set up. I've checked on Amazon for parts, but I really don't know what I'm looking for. Do you guys have any suggestions?