Just for the record. I believe these beetles often are already inside of wood
that is used in home construction. They are just waiting to grow up and come
out. They don't eat as adults, but the earlier stages bury into and consume
wood, often moist wood. They leave holes in the wood when they tunnel out of it
as adults. When they are active you can often find sawdust like material near
the holes; "chaff" or something its called. I have some windows that I could
hear noises emanating from certain months, and I noticed birds and bees
attracted to the windows. The first person I had look into this didn't find
anything---I was worried about termites mostly. I finally figured it out
(wordworm beetles) after determining the holes were not machined (they are
perfectly round and the same size as other holes routed to hold screens etc.)
and investigating online.
My guess is they are not coming in from outside the condo, but that they are
inside the wood that the condo was constructed with. LOOK FOR THE EXIT HOLES
and/or sawdust like chaff stuff. My holes were about 1/4 round (typical size
for machined holes and thus easy to overlook), most species have smaller holes
though. I sprayed Permathin mix into the holes, heard a brief whine sound (LOL)
at the 1st hole, and haven't had any new sawdust/chaff or noises in the last few
days. The eggs are laid and then they typically hatch at least 1 year later,
but they can apparently remain dormant for over a decade. I never really saw any
actual beetles (just found one tiny one that may be unrelated), which is common.
If you are finding lots it must be pretty bad I would think; they likely will
continue to reproduce/repeat until the cycle is stopped with insecticides or
replacing the wood.