Thinner works. I have a tip for you guys on cleaning your tires too. First before you spray any water on the car...( I use Westley's bleach white or Wal-Mart's tec 2000 wheel cleaner) spray cleaner on dry tire & wheel. Then with an old sponge dipped in the soapy water & wash the tire & wheel...the black shxx will just roll off the tire! I then lay the sponge on the ground & rinse with garden hose as to not dirty my wash water...makes the tires look brand new!
