windscreen wiper check

https://mytestvehiclebrakesplus.almoheet-travel.com/how-to-properly-test-vehicle-brakes-for-safety-and-performance

You're about to head out in heavy rain, so you give the windscreen wipers a quick once-over. You lift each blade to check for cracks or stiffness, then spray some washer fluid and watch them clear the glass. A clean sweep without smears or streaks means they're ready for the downpour.