I have read conflicting views on bore oiling wooden/composite horns. IS it best to oil the bore only after cleaning with soap/water? Or is this something that should be done more regularly? Also, what bore oil do you use? I have used Dr. Ducks ax wax for YEARS for unfinished wood. Theur web site also recomends it for woodwinds. As I have a lot of it, I was planning on using it. Any problems with that idea?