09-21-2014, 02:31 PM
You might try this. The reviews are pretty good. It might help to inhibit belt slipping.
http://www.amazon.com/Motor-Medic-Gunk-M206-Conditioner/dp/B000ABCHMS/ref=sr_1_1?s=automotive&ie=UTF8&qid=1411324115&sr=1-1&keywords=belt+dressing#productDetails
http://www.amazon.com/Motor-Medic-Gunk-M206-Conditioner/dp/B000ABCHMS/ref=sr_1_1?s=automotive&ie=UTF8&qid=1411324115&sr=1-1&keywords=belt+dressing#productDetails