Hi
Every summer we start to get wasps coming in our bedroom in the spare room at my mum's. I don't know how they get in, they get in even when the windows are closed. There is an air vent in the wall but thats closed most of the time.
What affordable thing can my mum do to stop this? I'm staying with her tonight and there is a wasp righy now driving me and itself mad as it buzzes round trying to escape! ! Im worried about cost of an expert or pest control, mum or me even can't afford to pay much.