I kept a toaster oven tray and pour acetone so it fills it half way and then soak the tires in it for a couple of hours with plastic wrap sealing in the vapors and keeping the acetone from evaporating and it works like a charm. From there I flip the wheels over and seal it back up. Tires come right off but CA residue can remain so I brush it off with a toothbrush and shake it off in a tub of lacquer thinner to get it all off the brush and repeat as needed before a final 2-5 minute soak in the acetone. As soon as I pull them out of the acetone for the final time I snap them hard and any remaining glue falls right off, leaving the wheels and tires clean. A bit of work but it doesn't harm anything except the cheap foam will expand and firm up a tad.