Hi Mushy!!
I too have cats who:
1. Attack my hose when my CPAP is off and defenseless.
2. Shake the hose to wake me up so I'll feed them.
So here are my solutions:
A. I tried coating the hose with tabasco sauce, but I wouldn't recommend it. It ended up all over my face.
B. I also bought some bitter tasting stuff at the pet store to deter them. I don't know how well it works yet because I-
C. Bought a pile of ridiculously cheap tube socks, cut the toes off and threaded them on my hose. I don't use a humidifier, but if you do, this solution has the added benefit of insulating the hose so the water doesn't "rainout". I haven't had any more teeth holes, but the hose is a little heavy. I can still move around however.
BTW, the best thing I've found to cover the holes is Saran Wrap.
Meow!!
Vicki

: : : : (The dead give-away that it was the cat)
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That which does not kill you makes you stronger-Friedrich Nietzsche
Friedrich must of had apnea.