When cleaning the dashboard with a spray cleaner/conditioner, the spray gets all over the inside of the front window. To avoid this, I took a large flat piece of cardboard and cut one of the long edges so that the corners are rounded to fit into the corners of the front window. On the other long edge, I cut a notch for the rear-view mirror. This allows me to hold the cardboard up to the window tightly to act as a barrier to prevent the dash cleaner from spattering on the window glass.
I bought a detail brush at a local auto parts store. It is round and has nice long bristles that are about 2" long. I keep this handy in the console, then when I’m sitting in traffic or waiting for a long traffic signal, I get the bush and dust around the crevices (like A/C vents), dials and knobs that collect dust. It’s just a way of helping keep the dash area looking nice.