On Thu, 21 Apr 2016 11:54:35 -0700 (PDT), TimR
wrote:

However there is no way to get vacuum or brush anywhere near the inner /\ coils. I blow them off with a can of spray air, as best I can. It's better than nothing but doesn't really clean them.

+1 Unless your take the box outside and put some real air to dislodge
crud.