One of the doors in the new apartment I moved in had a termite infestation. We noticed some of that peculiar poo dust and I bought a termite-killing bug spray with an insert needle. Used it twice, but after a couple of weeks there it was again.
I finally got rid of the door and bought a new one, made of treated solid wood, said to be bug-proof.
Goddamn! Everytime this happens I am terrified that these little buggers might damage my amps or instruments.