I regularly use Clean and Dull as my main serious cleaner (no spinner,just by hand). It really pulls the grime out. It may just be me, but on my polished Depth Charge, it does seem to reduce the shine just ever so slightly, but I see no difference on my Phenom Unleashed. I'm thinking that for the DC, I might have to lightly hit it with Magic Shine to keep the length after using the Clean and Dull. BTW, I just recently got both of these balls, and they are both awesome with strong backends. Couldn't be happier, at least for now ;-)