Easiest Way to Clean Your Car Headlights

So, I found the easiest, cheapest, and fastest way to make your car lights look like brand new.Here's a list of the things you'll need to get:
400-grit sandpaper
800-grit sandpaper
2000-grit sandpaper
wax
bucket with hot water
Step 1:
As soon as you have all the equipment ready, you're good to go. wash the headlight with the warm water and then dip the 400-grit sandpaper in it, start sanding the headlight gently in circular motion, make sure you sand every part of the headlight to get the best result.
Step 2:
Wash the headlight again with warm water, and start rubbing it with the 800-grit sandpaper (after you dipped it in the water), wash and rub for 4-5 times, make sure you do it quiet gently.
Step 3:
Almost done, wash your headlight again and take the 2000-grit sandpaper, dip it, and start rubbing. do it as gently as you can for 2-3 minutes for each headlight, wash the headlight 4-5 times while you do it.
Step 4:
After you finished sanding your headlight wash it one last time and make sure you sanded it evenly (if not, repeat step 4).wait few minutes for the headlight to fully dry, and then apply big amount of wax on each headlight using a piece of fabric.