Biting gnats/no see ums....trapping?

Where all do you put the bt? We’re surrounded by woods, and the gnats seem to breed in there…I have no idea how I’d treat all that area?

My mosquito magnet ran out of propane and I haven’t had time to refill, and I’ve seen a spike in gnats since it’s been down. I’m eager to get it going again!

I use a very little bit on damp areas. I think the application rate is like 3-4 granules per square foot or something ridiculously low like that. I don’t have woods so I just throw it on the ground with my hands honestly. Putting it in a spreader would also probably work.