I could be wrong but I think you can send the cymbals back to Zildian and get them to reapply the logo. For me personally, I play jazz a bit more than any other genre so my cymbals don't get cleaned as much (if at all). In most cases the dirtier (and older) the cymbal, the better it sounds. Now for anything else I tend to use either Roadie in a bottle or the Zildian cleaner, but both will for sure rub the logo off.