2 options came to me from the internet.
# Follow the ifixit guide on how to dissassemble the entire thing and get to the screens where you can then clean off the screen and backside of the lens.
# remove the lens from the housing directly. The lenses are stuck on with the equivalent of a gooey doublestick tape.
I went with option 2. I got an ifixit toolkit and used their plastic tools to pry out the lens and clean out the interior that way. Dont use metal tools!!! the lens itself is definetly softer than metal tools and you will end up scratching them if you slip at all with a pry tool. also important to note to pry then lens away from more than one location around it. The rim that it sets in is prone to being damaged. While not the end of the world, it can look a little ugly.
Also another reason to go with option 2 is that there is a good chance you will end up missing a spec or two, or even end up adding one or so when cleaning the screen and lens. Its a lot easier to redo the process for option 2 once it has been done before as the glue is a bit softer afterwards and easier to pry.