Do you have birdhouses?
I love building birdhouses, and sometimes I sell them or give them as gifts.
There is one thing about birdhouses that many people neglect to do.
They need to be cleaned every year.
When I build birdhouse, I always make sure there is an access to the inside.
On these examples, the bottom panel is easily removed for cleaning.
I have found that they get pretty full of nesting material after the birds move out in the fall.
I have found wasp nests and spider nests inside too.
The birds that move into this love nest, can build the best nest possible because it is squeaky clean.