I think that the Windex has definitely settled by now, but the air is completely saturated with snark. 
An aerosol is any suspension of fine liquid or solid particles in a gas, including ordinary air. An aerosol doesn’t need to come from a pressurized can. Air is sufficient enough to produce an aerosol. Such ordinary things as clouds, dust, and fog are aerosols.
Like old-fashioned perfume “atomizer” squeeze bottles. (They do not, as it happens, reduce the spray to atoms!)
Thanks! Didn’t know that.
Why the hell do you need to know this?
Perhaps he’s recently watched Steve Martin’s The Man With Two Brains and is trying to develop a new method?