What's the best way to clean the nitrile bels that come with our turntables? I ask because I had a bit of a scare today, my Scoutmaster all of a sudden wouldn't spinn with the ring clamp on. Then I remembered I had used my bare hand to change to the 45RPM pulley. I cleaned the pulley and belt with tech grade isopropyl alcohol, and all was well again. But it occurred to me, iso can dry rubber over time. Is there a better way? Oh, and I already know: no more bare fingers on the belt!