Lukelee: I have really oily skin, everything I would touch would leave a fingerprint...even right after I washed my hands! Since I started using my own soap, that problem is history. My soaps almost all have 20-30% CO in them. For the first couple of weeks, I was worried because it felt like my hands were getting really, really dry...especially my knuckles. After my skin got used to the real soap and not the supermarket crap, everything balanced out. Now they are great and soft and not oily. I'll tell you though, any more CO than that and I think it would be really harsh. In my opinion, 30% is pushing it with the CO.