If the inside of either headlight is foggy you can remove that by rinsing the inside with "pure" methanol. It requires removing the headlight pouring some methanol in the running light lamp hole, swishing it around and pouring it out. You do this several times to remove the fogging inside. There are threads on the forum going into more detail on this.

Here is an Amazon link for methanol I used in restoring a used headlight: