Ended up putting in the gortex patches to help eliminate the fogging in the Roadster headlights. Recommended: 2 patches per side - Cost: $4 per patch so $16 total for the full job. I attached some pics. They have a sticky glue, I used the plastic backing as a template, just cut it in half from the paired patch. Then scotch tape it up into your headlight enclosure for a template. Use a drill that fits inside of the rectangle cutout, this allows the glue to have maximum stickiness so it won't fall off. I also sanded down the area I drilled, that way if roughs up the surface for a better contact. It also removes burrs that will cause the patch Ito eventually not have an even application and eventually allow it to fail to apply to the headlight housing correctly. In the pics you can see how I applied it to the rear / lower headlight housing for a proper application. Also in the first pic, a very awesome and long term Roadster Technician took the time to show me how to apply them, that's his pen marks. He indicated to drill holes as he'd circled which are on the inside of the glue marks. Love he long term veterans of Tesla!