chickens poo in nest

[amenfarm]

So finally after a year of research, I ordered a coop to pick up the weekend of Easter

. I have 2 black orpington hens, 1EE, 1 buff orpington and maybe a wellsummer holding for the coop to get here. My question, is there anyway to retrain the Black Orpingtons Not to poo in the nest boxes?
I have to check replys on sunday leaving for outof town.

 

[MadabtChickens]

I was told to make sure the roosts are higher than the nest boxes. I raised my roost and don't have to clean the nest box out every day, but they do still poop in it sometimes.