A system for detecting contamination in a two-phase immersion cooling system based on current leakage between two combs on a printed circuit board. A first comb is opposite a second comb, wherein each finger of the first comb is positioned between two adjacent fingers on the second comb. The combs are positioned near a heat source in the liquid portion of the fluid. As the fluid boils, contaminants are distilled out of the fluid. Acidic contaminants deposited on either comb may cause metal migration to occur, resulting in bridging between two combs. A current sensor may detect the current leakage and send a signal to allow the information handling system, the fluid, or the cooling system to be serviced before damage occurs to the information handling system.