Beckson portlights fogging up how to remove fogging

[Denny Vitton]

Does anyone have a good way of cleaning Beckson clear portlight lens? Mine have foged up and now are hard to see through. Beckson indicated use soap and water which clearly does not work. I have tried some headlight fog removal cleaner with no luck. Has anyone successfully cleaned these portlight?

[Sailmonkey]

Chances are the “fog” is internal crazing of the plastic lens from UV damage. You’re not able to polish this out.