I am having some very successful staggered hatches and now with the third set of eggs under way, the water trays are beginning to sour from the previous chicks' residue. I have not had a chance to clean and disinfect in between hatches. The present eggs are on the 14th day and are doing well. Is it worth chilling the eggs to disassemble and wash the trays or should I let it go? The eggs were partitioned from the chicks so they are clean, as well as the rest of the incubator. Only the water is souring.