We get the same RAIN & humid weather here (Hawaii) but think I found the solution with my latest RC (run/coop). I'm limited to 6 hens & been able to keep it down to 4
My "enclosure" is 8'x12'x7' = 96 sq ft, roofed & open air, a huge plastic dog house for nest box, dirt floor covered in shavings (DLM), it's wrapped in shower curtains on EMT rods that I close at night/rain, rope tie down the curtains when the winds pick up. It's simple & works for me....
I just keep adding shavings, DE & Sweet PDZ....No smell, no flies...




I just keep adding shavings, DE & Sweet PDZ....No smell, no flies...