[https://www.ifixit.com/User/2554432/Amy+Roszak|'''++@poulsbomom++''']
If those spots are the ones you are referring to
[image|1484729]
then this could be a tricky fix. Looks like the debris is just past the outside cam frame. Since there are to many steps involved to try to explain this on here, I added the disassembly instruction from the SM [document|4788]. Chapter 9-4 addresses the lens unit for repair
Or you could of course opt to replace the lens.