are you sure the damage is to the inside of the lens, it may only be on the outside. Ever noticed moisture inside the lens? If not the cloudiness is just on the outside and that can easily be fixed check out The Headlight Solution for more information about clouy, foggy headlight lenses and how to repair / restore them like new. The sell headlight restoration kits through there websire at http://www.headlightsolution.net
If you use turtle wax it will clean it up pretty good if it from the outside of theheadlights
If the inside is dirty or cloudy it's probably because of a cracked headlight assembly. Unfortunately you can't really do much to clean it. I guess you could remove it, rinse it out with distilled water, blow it dry then put it back, but even that probably won't do much good. The reflective surface on the inside is very soft and will come off and/or scratch easily so don't touch it with anything.
clean the filter
Sell it!
To keep glass from looking cloudy, clean with soapy water and wipe clean with a microfiber cloth. If it is still cloudy, spray it with rubbing alcohol and dry again.
Kitchenaid whisper quiet dishwasher does not clean dishes good. Glasses are worse. Also glases are cloudy.
You can't, but if you are talking about getting the cloudyness off, then polishing compound and then wax. You may have to do it a couple times, all according to how cloudy your lights are. If your talking about the inside of your lights I'm afraid they will have to be replaced. Try the compound first to see how that works, just take your time.
Clean the tank, dont overfeed them
Not keeping it clean and buffed, obviously !!
Cloudy water usually takes care of itself. It is usually caused by a kind of algae that floats in the water. If the tank is in the sun, cover the window or move the tank. If you have lights on the aquarium, make the amount of time they are on each day shorter.
Check with your local auto parts store, they have kits available that help you restore the faded/cloudy headlight lenses.
No they dont have one