I would also remove the metal trays. I use shaving instead of straw. I found straw gets crushed and causes lots of dust. I went down to the hobby store and bought some brown wood eggs. I still keep the wood eggs in the boxes as a reminder were to lay. My younger hens still forget and have a favorite bush. I keep the wood eggs in the boxes so when a hen goes broody it seeks out the wood eggs to set on instead of the ones that get gathered. Most of my hens start to lay 22-30 weeks average around 24.
Our chickens actually seemed to prefer sitting in the paper to roosting. It did make it easier to clean out. The paper would absorb moisture from the droppings and at the end of the week it would all come out as almost one piece or you could just add moree over the top
