We live on 5th floor. Bees are building on both sides of air-conditioner. We can't reach them (wood encloses a.c. on both sides). How do we get rid without taking out window and screens so high up? We use wasp & hornet killer spray but the spray floats "upwards" against the building and is not effective. The big fat bees frequently fight with one another? They are very intelligent and when they see one of us inside they fly angrily and wildly around (out of reach).