A well-fitted peg of reasonably good quality ebony, rosewood or boxwood usually needs very little attention.
Humidity changes in the weather can make it stick or stutter.
To eliminate the problem, remove the string from one peg and remove the peg from the pegbox. Fitting new pegs Quite often pegs of poor quality wear in the area where they have contact with the pegbox and even show deep cuts where the strings'wrap around the peg. Saving these pegs and re-fitting them is usually a futile effort and we would strongly recommend the fitting of a new ebony or rosewood peg. Choose a peg of proper headsize with a stem diameter large enough to be shaped on the opening of your peg shaper which is slightly larger than the hole in the pegbox. A. Shape the peg on your peg shaper to assure perfect roundness.