If I put my finger in front of lips and buzz, it will never get wet. The buzz is completely dry, yet after playing a few minutes, the "spit" valve is already full. Is it really spit or is something else going on? My thinking was that there is air (including some vapor) inside the leadpipe, and when you put in your mouthpiece and buzz, the leadpipe is entirely sealed, and the heat from the air you are blowing causes causes the vapor in the leadpipe to condense. Any thoughts on this?