Any kind of light oil or wax works well. A really fine scotchbrite pad will re-smooth the neck also.
+1. A semi-worn Scotchbrite pad and Briwax (www.woodworkers.com) will do the trick. For more agressive treatment, I use Tru-Birch gunstock oil and #0000 steel wool.
Riis
__________________ "20% of the money will buy you 90% of the sound..another 30% of the money will buy you another 5% of the sound..you can't buy the remaining 5% of the sound because nobody can agree about what it is."