Have you ever gotten the 100% silicon treadmill belt oil on your motor belt? if you have you've probably worried you ruined the whole treadmill because it skips constantly and you can't get the oil off. i went online to try to find solutions and everything i found only got be about 60-80% of the way there... this (chalk) is the only thing I've found that works completely for a long period of time and you can easily go back and tune it up months later when it inevitably starts skipping again... that oil is tenacious!

TL;DR if you need to eliminate the shipping effects of silicon oil on your motor wheel wipe it off as best you can based on other tutorials and THEN strike chalk against the entire length of the belt