I have a set of stanleys. One is brand new, the other was one that was on the car when I got it and it's pretty foggy. I don't want to buy another new one and I tried the autozone defogger crap and it didn't work. Does anybody have a recommendation on another way to do it that'll actually work?

 

the outer layer is already gone and will never be the same again. buy a new replacement. its not too much money.

 

Stanleys?
Is this a brand or type of headlight?

 

Brand. The OEM light

 

Those headlight restore kits are pretty crappy.
Mothers mag wheel polish works well on removing yellowing, but if the yellowing/hazing is deeper you will need to use fine sandpaper to remove the oxidized surface, then buff/polish it out. However this will not bring it back to new like condition, as the lens will degrade inside and out. And if the lens is completely hazed/yellowed/checking the housing is pretty well done.

 

I tried Mothers on my wife's car (BMW) and it cleared the fog off the lenses very well. But there is spidering on the inside of one lens and nothing will fix that. But for now it is a big improvement. And the original headlights on my Accord held up a LOT better than the ones on the BMW.

 

I liked the rain-x kit a lot for my older grand Cherokee. The mother's kit is pretty decent, too, but wet sanding is necessary. The rain-x kit includes some pads to do this, and I believe so does the 3m kit. Regular waxing of the headlights should prevent further fogging, but you'll need to redo the sealant that comes with most kits regularly.