Nest Box Help: No money involved, need creativity!

[freelancedance]

Nest boxes
I use milk crates with a zip ties to hold a board in place across the front.
In my nest boxes I fold a feed bag to fit (nest boxes are 1 ft³). When a bag gets soiled; fold a new one; pop out the soiled; pop in the new. Feed bags are a nylon mesh bag frozen poop just peels off in below freezing temperatures and just flakes off in summer when left out in the sun to bake and dry.

Thats smart! I will have to think on it!