I just received an SACD hybrid disc (The Coronation of King George II) and it has a little sticker on the back that says "Do not use liquid cleaning and/or anti-static solutions on this disc." The other hybrid discs I received don't say this. Does anyone know if this is something that should be followed for all SACD and/or hybrid discs or just this one (for whatever reason)? How then should one clean fingerprints etc. off of such a disc (aside from not putting them there in the first place)?