There is both fogging and scratches. As I look at other q45's this seems to be a fairly common problem so there must be a way to fix it.
I guess fogging was the wrong description....there seems to be a residue on the outside of the lens which is causing a fogging appearance.

Is the fogging also include water inside the plastic lenses? Is the fogging due to abrasion and scratches outside the lens?
Both problems can be solved easily the story is quite lengthy. E-mail me which it is and I'll describe how to repair.

***OK, here we go. Sense it's the outside of the lens there is a way to do a fairly good job to be able to see your bulb reflectors once again. Go on line or look in auto parts stores for: Flitz polishing paste. It comes in a large tooth paste looking roll - up tube. Also the same company makes an orange Italian felt serrated flap ball. It can be driven by a 3/8 electric drill or battery drill motor. Simply smear some of this paste on the flap wheel and start the drill slowly to get the feel of it. Keep moving so as not to soften the plastic lens by the heat generated by the flap ball or the paste. You have to be patient.

It took me an hour per headlight to clean them up. They were so bad they were yellow and you could not see the reflector through the face of the headlamp lens.

I worked for a glass company who made the old style head lamps made of 100% glass. We never had to replace them do to abrasion. New style cheap soft plastic headlight exotic shapes put us out of business. Soon after we started making car catalyic converter ceramic honeycomb substraights, for cars and diesels, glass fiber optic cable, and flat screen TV glass.

Your auto-parts store should sell the pads and polish for clearing up the scratches and haze. This usually works once.