Hey guys, the fixed clamps that came with my machine has seen alot of use. It has a diamond dusted coating and I can see a lot of residue on them. I tried to use a toothbrush, as the manual said, along with isopropyl alcohol, to scrub away the buildup but they still slip a little bit. What other things can I do? I saw a string clamp cleaning stones on A T S, can I use those? Or is it time to just buy new clamps? For Bret (GammaTech), is the diamond plate replaceable?