it's a bad headlight, the seal is broken on the lens.
Yes
To clean the inside headlight lens on a ford ranger just simply remove the cap and clean.
The answer to how to clean your headlight lens depends on how dirty your lens is. If it just has bug juice and road grime any good car soap will clean it, just be carefull not to scratch the plastic. However if your lens is really yellowed or the clear coat cracked then you will need kit designed to clean the lens.
There are a number of Headlight cleaning kits available, some work, some don't. Google Clean your headlight lens, and call or research the companies to find the best.
put the headlight in the oven at about 215 degrees for about 5 min then pull the lens off the housing, clean it then use some automotive glue and push the lens back in. look it up on YouTube very simple
Try using a carwax and a clean shop towel and scrub the lens surface like your polishing your car paint. It takes a while of rubbing but it worked in my 2003 corolla.
make sure the contacts are clean and plugged in properly
I used 800, 1000, 2000 sandpaper then buffed with rubbing compound.
If your headlight lens need surface oxidation cleaned from them you do not need to remove them. You can clean them on the car with Pittman's Original One Step Acrylic lens restorer. It takes only a few seconds for each lens and does not require any tools. http://www.ibc34.com/Before-and-After.html
Cleaning Foggy HeadlightsFog is a description used to describe oxidation that sits on the surface of Plastic headlights. It comes from the UV layer deteriorating because of exposure to the elements. The only way to clean the headlight is to first remove the decomposed plastic then put on a new coat of protectant.There are several ways to do this. The easiest is to have a professional come out and clean your headlight lens. The next is to purchase a kit designed for that purpose. Some kits require the use of a drill or a buffer, some do not. Search "headlight lens cleaner" on the internet for the options available. The most expensive is to replace the headlight lens.
My Beetle is a 2002 it had some bad yellowing of the headlights, I tried The Headlight Solution at headlightsolution.net , the advanced headlight restoration kit worked great, it was fast, and easy. Good Luck.