[Biturbos4] Climate control button stuck

[Long, Scott G A1C USAF AFMC 88 SFS/S4W]

Have any of you had a problem with your climate control head unit?  The
buttons on mine like to stick (so do some of the buttons on my radio).
This morning I turned the heat on low because it was cold out and I
pushed the vent selector and the floor selector.  The floor selector
button is stuck pushed in, and now it locks out all the other buttons.
I can't even turn this off without pulling the fuse.  This has happened
before and it usually works it's way back out, but it is an annoying
problem.  Since the unit technically works, I don't want to spend the
money to replace it.  I'd like to clean it somehow if I could.  I
believe the dealer sprayed armor all on it and the liquid got in behind
the buttons.  Some of the buttons "click" like they are sticky when I
push them such as the temp up and down and the fan up and down.  But the
low vent button is the only one that always sticks.  It's quite
annoying.

Scott G. Long