In most cars, if you hit the window wash button the spray comes out, and the windshield wipers go back and forth three times clearing the window of dirt and salt. (bestride.com)
Get a «fluffy bum on board» clear window sticker for your car window or stroller. (diapersewingsupplies.com)
These types of questions encourage investigation and help people develop clearer windows and mirrors. (edutopia.org)