Nancy Galambush said: I asked about this at Potter's music in Bethesda MD because the pegs on my old cello were slipping. I was told about the peg dope; however he suggested Lava Soap, which is what he used. I told a cello friend about it recently and she tried it and said it is working fine. The grit in the Lava holds while the soap is slippery. At least this is the idea. I didn't try it on my old cello because I haven't changed the strings on it since buying a new one.
I have to say that years ago on someone else's recommendation I tried the Lava soap trick on my antique banjo with wooden pegs, using just a little on one peg, and it was a
total disaster for me. The peg would not hold at ALL, it slipped like it was covered in grease. I tried wiping the Lava off with a damp cloth and I had to really scrub and scrub to get rid of the soap film residue that did not want to go away. It was an awful experience for me. Then I bought the Peg Drops and it worked like magic. Just my own experience.