OMD - Dust inside viewfinder.

My gf dropped my camera (she's now recovering in intensive care) and now it seems that the knock may have dislodged some kind of particle inside the viewfinder.

Anyone ever had any experience with removing those two small screw that appear to open the viewfinder or had any similar experience regarding a foreign body within the viewfinder?

Although it doesn't affect the actual photograph, it is mildly distracting.