luckbox
Straight
Oxyclean followed by mineral oil.
i think that is the best solution for super dirty chips....for paulson casino chips, i would let them soak in a 25% Oxy with 75% water for a few hours, some overnite and it never hurt any, once in awhile you get water under an inlay but just let it air our for a few days and it usually will dry ....go light on the mineral oil and let those dry fully before you rack em up otherwise they will stick together