I finnaly took the top tier of nest boxes OFF & made a roost up there, to try and stop the roosting in the other lower nest boxes & the poop in them making quite a MESS!! . then I made a ramp UP HIGHER still. Then put a roost up high 1 1/2 ft from the roof and way higher & away from the nest box. I think they might like to roost high instead of in the box. thanks for all your help Tool.