one of the first thiogs I did was to was them very good with Dish soap, don't do the bike just the tires, as it will strip off any wax you have on the bike, but thats exactly what you want removed from the tires. They have a Mold release on them that was sprayed on the surface of the mold so they will pop out without any trouble. and just ride her easy, for a 100 or so miles.
later