Big buggers here too, they're tormenting me right now! I can't escape outside and work out there cos of the midgies, occasional horseflies and swarms of tiny weenie flies that hang around any water on the ground, where animals spill, tap drips etc although they don't bite or anything.
The cats's think it's great sport flinging themselves at the windows and give them their dues they are catching some flies for me, just as well.
BUT the worst thing I'm struggling with here is fleas
never had such a problem ever and only on the cats, nothing on the dogs. This house has tiny windows so poor airflow, it's obviously got warm and humid and they're loving it. Upstairs is always hotter than downstairs and it's all carpet up there, makes me want to rip it all up! Poor cats have been frontlined as often as allowed, then flea powdered with DE, and I've treated the carpets with the same. Got a flea bomb to try later, and sent for a different spot on thing, the frontline doesn't seem effective now, hope it arrives before it gets really out of hand