I removed the diffusion plate. It is covered with the same sticky oily and sour to the taste substance that I suspect caused the uv filter to crack in such a bizarre pattern...in any event I need to clean it. Eric, once I remove the four screws will those little spring-loaded glass rods come flying out? I guess I'll use dilute rubbing alcohol or a windex-soaked paper towel to clean the filter.

When I pulled the magenta filter I noticed an aberration on the dichroic surface. Am I nitpicking in thinking I should try to replace it too?