Phil is right check that thread. Meguiars makes a nice kit or you can get some Meguiars ScratchX and start buffing away. That will get rid of the haze and etching. I use a porter cable buffer to do mine with the ScratchX, it takes all of about 5 minutes. I also polish them when I polish the car monthly and after every wash, detail spray. This is common with these types of lenses, it does return after a while. I did mine last spring, second time and will probably be doing it again this spring.
Pat