Hi there! I have used an orange peel in mine in the past. Just put a small piece in the jar and check them frequently. It doen not happen really fast, but it definitely works. I had a friend years ago who used to do this to add moisture to his pounds of pot in order to add a little weight..he went a bit overboard, but this is a good technique to help make it smoke a little better. Just do not leave it in too long the peel can mold. It may smell like citrus for a bit, but this goes away.
I dry mine in a dark room hanging on a rack with a fan blowing for about a week, then alternate putting them in brown paper bags and jars. I have cured buds in jars after doing the alternating thing for a week or so, opening the lid for 20-30 minutes a couple times a day. My buds burn really well and taste fantastic. Do a search for curing buds, there is a definite technique and what will work depends on where you live. I live in a very humid place, so that is why I use a fan. It makes such a difference in the final product if they are cured well. ( I learned the hard way.
Good luck!