I have the same problem here in the UK too.
Because of the warm sticky weather we're currently having, there's loads of flying nasties about. Mossies, midgies, fruit flies, wasps and flies in general. Can't leave the windows open to cool the house down at night, it's a pain.
When I used to smoke the flies used to stay away, now that I vape mainly fruit liquids it must be some sort of aphrodisiac to them