The word is "FAZE", not "phase".
I find that brake cleaner tends to FAZE them rather well.
Look for their home. It'll be a piece of wood with several holes in it about
3/8ths of an inch in diameter.
Get some corks, wait for nightfall, cork up every hole, remove the piece of wood,
and burn it. Carpenter bee problem solved.
Alternative means may involve corking all but the top hole and filling the piece of
wood with something potent. Glue, gasoline, lacquer thinner, maybe even silicone caulk.
Lighting this piece of wood on fire is optional but effective and entertaining.
A tennis racket is good carpenter bee medicine, and fun, too!
CJ