Not feeling allen wrench trick for stuck valves

[Sculldog1]

Hi everyone, Just a quick thought on the advice of trying to free a stuck valve using an allen wrench through spark plug hole. I tried this recently after no luck freeing a stuck valve through valve gallery. People should be super careful not to drop allen wrench into cylinder as I did. Not a big deal as I was at head removal point anyway but those who may not be able remove the head or that need to run engine despite stuck valve should probably not try this. Also found out, hard way of course, that stuck valves usually indicate moisture from exhaust troubles and best to get to root cause before things get progressively worse.