When i use my tremelo on my strat i hear a ping noise when i use it near the string trees, that noise that you hear sometimes when you're tuning it. How can i fix this?
That noise may be the string popping in the nut. Lube the nut with some pencil lead (graphite) and see if it helps. Could be the string rubbing the string tree. Try raising it. Only other option (if my theories are correct) is a locking nut.
It could also be a floppy tuning peg giving a bit.