I really don't want to help brb and I have him on ignore so he won't see this
but a bowl of boiling water left in the affected room overnight it a good wy of catching fleas as they detect the heat
(piss and shit, Mon 5 Aug 2024, 19:59, archived)

Also a white sticky pad with a bulb over it

( mr horrible up yours, dickface, Mon 5 Aug 2024, 20:05, archived)