After a good initial cleaning on an RCM, all you should have to do is use a good carbon brush before - - - and after - - - each play (as Mofimadness said). And, as others have said, after the initial cleaning make sure you store the record in a clean inner sleeve.
Or course, accidents sometimes happen, and if the cat happens to barf on the record, you'll need to start anew.
Or course, accidents sometimes happen, and if the cat happens to barf on the record, you'll need to start anew.