Sweating profusely, shave head keeps falling off, the stall is glass, so it makes a resonating bonk sound everytime my head hits it.

Fair enough, but I feel like you glossed over the second half of my sentence.

If you’re getting feces in the shaver you haven’t cleaned properly…

I don’t know if it’s water proof and my shower stall is too small

That thing falls in the toilet every time I do the same. I just fish it out and wash it thoroughly.