If your headlights appear dim
Apply toothpaste to the light covers using a lint-free paper towel, then rinse with a sponge and warm water. The mild abrasives in the toothpaste will remove dirt without damaging the road surface.
When Trapped in a Car
Please note that most vehicle headrests are removable. If you can’t open the door or window, try to crack the side window using the metal brackets on the headrest. However, this may not be possible in a submerged vehicle. Tempered glass is purposely made to be difficult to break, so good luck!