There are a few items around the house that you don’t even think about cleaning. Window screens are just those items. “Did you know that rain actually doesnt make your windows dirty? Its when rain passes through a dirty screen and carries dirt and debris with it onto your window that you see splotches after an April shower,”David Flax, Vice President of Operations for Window Genie, a Neighborly Company, tells Reader’s Digest.”Its likely your screens accumulated a lot of dust, dirt, and other contaminants over the long winter, so prevent recurring dirty windows by also having your screens thoroughly cleaned during your first window cleaning of the spring season.”