At wife's suggestion (I thought she was crazy) I used wetted Comet cleanser on mine. Took a couple of minutes of elbow grease and they looked much better. Coated with car wax.
After cleaning I noticed one of the headlights had most of the chrome reflector missing from inside. I had noticed it was dimmer than the other, but was so fogged up I couldn't see the missing chrome. Ended up doing the sport headlight conversion and am very pleased. Should have done it much earlier. Might be a good time for sport headlights if you don't already have them.