Snow rules
If you leave your wipers on when you turn the ignition off, when you turn it back on again they will wipe. This is mostly fine except when it has snowed and you are leaning in to the car to start it to warm it up. You get snow in your boots.
Alternatively you get a big pile of snow in your car and two days later your husband asks why the floor of the driver's side looks like an ice rink. Oops!