Re: GoPro Fogging Issues
 

Glass huh? OK, but my point was that you'd never buy a £300 camera, fit it with an uncoated clear filter (its new front element), never use a hood and step out into the sunshine. In the still camera mode it's pretty easy to see the added flare introduced by the dome.

Re: GoPro Fogging Issues
 

I guess it depends on the type of shooting you do, I shoot sports in sandy, wet, windy conditions, so ALL my cameras regardless of value have at least protective uv or clear glass filters.

As you can't change the GoPro lens without voiding your warrantee, keeping it covered at all times seems like I good idea to me and you can pass the flares off as an artistic bonus. :-)