Not trying to be snarky (despite that being my natural state) but possibly see what is coming to your table with your players??
I've been hosting for ~15 years now using clay chips and I have not seen this happen in my games... with one exception. The night a player came in late with his bag of Jack in the Box and proceeded to eat at the table while playing. At the end of the night, the chips went back into the cage and on their shelf. The next game happened two weeks later and the night before, I opened the cage to pre-build starting stacks and the stench of rancid fast food out of that cage nearly knocked me over when I opened the cage.
I have since politely asked players to eat before coming to the game. If they have to eat while present, we just play around them while they eat away from the table and then enforce a "wash your damn hands" rule after. If any food happens, it's pretzels, nuts or cookies... things that generally don't leave a residue. I don't find 'sticky' chips across my sets, even after numerous games with those chips.
The 'hooker juice' we see on used casino chips is compacted funk from filthy players. As hosts, we have the benefit of enforcing a slightly different level of cleanliness than your typical casino or card room.