Help, my Ball Python is about to shed what do I do?

His eyes have turn a blueish mercury color. And his belly is pinkish; his skin is also a lighter more bland color. But I heard that they don't eat right before a shed? Then why did my Bally eat just on Friday? Anyhow, when will he fully shed and what do I do to help him shed with more ease? I gave him a warm water bath a couple days ago. Should I give him another one? I don't keep his tank as humid as it should be because it can cause scale rot and make the cage stink. I heard giving them a warm bath or two before they shed will compensate for the lack of humidity. Is this correct? Please help.