Bake em for sure....I have boiled in the past, and the results were ok....I baked three sets the other day and baking works SO MUCH BETTER - put tires on a cookie sheet and throw them in the oven...then start the oven and set temp to 350 - once it gets to temp, shut the oven off and go do something for about an hour or so (or do it overnight). Come back, and the tires will come right off with no chunks, no wet foam, etc...you want the wheel to be cool before taking the tire off so you do not warp the rim...I will never boil again!