Welcome friend!! Definitely tons of useful.info here, typically with plastic chips dish detergent and warm water does the trick, oiling is not needed. With al chips we usually hand dry each chip! Not only ensuring the water is off but also just in case scrubbing missed anything on the chips we go over them with Terry cloths (10 pack in the automotive section at walmart) after you hand dry them I would not rack or case them... lay them out for 24 hours to ensure all moisture is gone similar to this.
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These are clay chips so oil has been applied but they are just laying on paper towels. After 24 hours your chips should be back to like new!! Best of luck!! Hope you stick around and maybe think about trying other types of chips and maybe even eventually up grade your set so you have a bit more chip security in your home game!! Fellow chipper Ben