Dust
You should check up there Duke,I swear I found my blue plastic fly swatter on my fridge the last time I dusted it.When you mentioned that I was amazed,what are the odds?Dust...and maybe a blue plastic fly swatter we lost and have no idea what happened to it.
Any dust?On top of my fridge is dry food storage - sugar, nuts, cereal in labeled plastic containers, and a few empty baskets