To Mike M.
Are those Carlon PVC cases?
?
I live 20ish miles south of Lexington KY, say 25 miles south of 38 degrees north latitude.
My PVC cases sure don't look like that after a few years! And, unless vented, always have water inside!
I've placed an empty Carlon case with a small hole in the bottom on a fence post and will check it next spring, April 1st.
?