How To Clean The Rubber On Athletic/Skater Shoes?

Question

I have a pair of skater shoes that have a white leather upper and the typical rubber soles and edging. I found a good product to clean and whiten the leather, but I don't know what to use to clean the rubber. I tried putting a pair of similar shoes in the washer once with bleach, and you already know the rubber came out yellowed. Any suggestions on how to thoroughly and effectively clean the rubber parts? Couldn't find any worthwhile tips by searching the web...

Answer 1

toothpaste and a toothbrush.