Summer Dust

Can you see the dust?
I’ve had the doors and windows open for the last couple of days to admit fresh breezes. Now everything in the house is coated with a fine, gritty layer of crud. This is how it will be for the rest of the season.
I’ve learned to protect my equipment with dust cloths, but no matter how frequently I wipe things down, every surface will recoat the moment I open the doors and windows. Filthy city!