whats wrong with a drop or two of oil in the lead pipe before playing ? sure seems it would eliminate a few problems , what other problem would that create ? we just got a new Besson 800 , so i hope the small amount of oil will coat the inside to protect it from looking green, and not allow minerals to stick and build up. The Horn Doctor in Anchorage AK. give me this tip to use . John has a ultra sonic cleaning bath . He also so said to really make a horn sound good is just regular cleaning, a bath not ultrasonic , but for a dirty horn it works the best.