This morning, I awoke to an odd smell. I blew my nose and inadvertently noticed that that which came out was black. Thinking it was the fan I have by my bed, I concluded that that was to blame - that it had somehow gone bad.
An hour later, the odd smell is still there. It's possible maybe I'm just smelling remnants of whatever it was in my nose but I dunno.
I checked the air filter and although it has very few clumps of dust on it it is quite black (as I recall, it was a white air filter).
Any ideas as to what the problem might (or might have) been?