I tried a few and ended up preferring the Nitty Gritty "Pure 2". Sometime after that I had a record cleaned by a record shop that also uses the NG machine but they used a popular homebrew formula. Not only did that not work very well but it added a layer of haze to the playback. After I took the LP home and cleaned the "clean" record again with the normal Pure 2 formula I found it was able to both clean the record and remove the gunk from the hommade stuff. YMMV but you can't really sell me on anything else at this point.
