Not dust spots on the camera's sensor (on this occasion) raindrops on the window, i.e. sunny intervals and showers.

Near intoxicated when I woke up this morning. An aerosol can of lacquer for printed circuit boards had fractionally split open and leaked out the majority of its contents. Was very lucky that the liquid stayed in the bottom drawer of a wee filing cabinet, and hadn't reached the carpet. Much stickiness was cleaned up, and the air's clearing of the fumes.