Recently i have been having a increasingly frustrating problem with my alto. I'll set it up and start playing, my saxophone will perform fantastic. Then everything goes downhill. My saxophone will refuse to play any note lower than a B( the on right in the middle of the scale) and the reed will not vibrate. if i try to force the note out, it will loudly squeak. Then maybe a minute later, i can play any note with no difficulty at all, like usually do. Cycle Repeats. What is my problem? Any help is appreciated. Thank you.