Be careful with the quantity of "mineral oil" in the US or "laxative" in Europe, which raises even more eyebrows in pharmacies, on the Continent.
Just HALF of a teaspoon MAXIMUM on a clean shoe-shine sponge for every 5 barrels (20-chip columns) of chips, on their rolling edges. Too much oil can enter the inlays and ruin them.
Then, you wipe the excess oil from each barrel with a soft cloth, and with the now slightly oiled soft micro-fiber cloth, you wipe the faces of chips, avoiding the inlays.
If you have too many sets, and the poor chips don't hit the felt regularly, you 'll notice their thirst, and re-oil every 3 or 4 years.
NOT appliccable to "ceramics" and plastic chips.
Unnecessary and risky for unused Paulsons.
Imperative for brand-new CPCs, after a nice lukewarm shower in a salad spinner.