And before this happens again...
Buy a cheap brush to keep your tires clean. Iturra designs sells one or Woodcraft has one. Or just take a cheap cleaning products brush from the grocery store with a wooden handle, cut it to size and superglue it to the saw so that the brush lightly presses on top of the wheel. I'm amazed that Delta and others can charge so much and not even have the decency to spend a quarter on something so simple. (end of rant).
BTW, I also use Simple Green on the tire, maybe once a year.