So I've been having issues with airy sound ever since my cork fell out of my spit valve after Marching Season. I had a temporary "fix", and it was replaced with some black rag-like cushion material, obviously not cork. And I'm very fluent with cleanliness, but there's a slightly annoying airy sound to it and I'm not sure if it's my technique that's causing it or the fact that I don't have a cork at the end of my spit valve. I thought it'd be important to bring up, since a judge will definitely nail me on that, and I plan on making first chair Wind Ensemble! Please help!