What kind of chips? For Paulson's I've had success with bowl of warm water and a teaspoon of Lundmark TSP which is sodium meta silicate. Light rubbing with a toothbrush, rinse, good to go. Will look close to brand new often. Esp good on hooker juice.
Some folks using magic erasere but that's more elbow grease than I prefer. Others swear by ultrasonicS.
ASM / CPC is suggest Dawn and water. TSP will damage them so don't use that.
Don't soak anything too long