A bit more, thanks Google!
"
- If your pegs are slipping or are too tight to securely adjust the strings, you may want to purchase peg compound (also called “peg dope”), an inexpensive commercial product.
- If you don’t have peg compound and need a temporary quick fix for slipping or tight pegs, you may want to try tips some violin teachers use: for sticking pegs, pull the peg partially out, and rub pencil graphite on the sticking part of the peg. For loose pegs, pull the peg partially out, and rub birthday candle wax on the peg to help it stick (some teachers recommend chalk to help pegs stick, but it's abrasive)."