Agree with
@Joe Mac. I have nothing but praise for this unit and its effectiveness. Also, it's amazing how many records you can get through if you have a few hours to just hang around your living space and do other stuff in between setting up the next record and then going back to it after the period of time you've allotted to the machine's cleaning/drying cycles. I haven't used anything other than distilled water. I'm not opposed to trying the G-Sonic solution, but I'm kind of waiting to hear from others about their experiences with surfactants. As has been mentioned in previous posts, it would be really difficult to objectively demonstrate that the surfactant improves upon what distilled water alone can accomplish. (My 34-year career centered around research methods and I'm hard-pressed to think of a design that would allow for such a demonstration.) That being said, I likely would be swayed by an abundance of anecdotal evidence!
Anyway, the main message here is that there isn't any reason to hesitate on this. For me, it has been one of the best upgrades I ever have made to my hi-fi endeavors.