if you want to know everything there is to know about record cleaning machines, read this thread. in the first post there are links to other related threads. whatever answer you are looking for will be there somewhere.
personally; i now own a KLAudio RCM, but i've also owned a VPI 16.5 RCM, 3 different Audiodesk RCM's, and 2 Loricraft RCM's. so i know a little about them. but not compared to the author of that thread.