Having just passed the 100 Hour milestone, with great trepidation I dutifully followed the Panasonic manual and carefully removed the filter for cleaning. Having read numerous other posts I was extra careful. On removal I was pleased to see that the filter was remarkably dust free so I gave it a gentle blow and replaced it back into the PJ. When I turned the projector on without the DVD switched on I faced the usual black(ish) screen with 3 what appeared to be pale greenish fist sized blobs and 1 paler redish blobs. These blobs are not visible when tested against the solid red, blue or green screens within the service menu so I am guessing not a pixel problem. When a DVD is played the blobs are only visible against a dark background but with a 2:35 ratio (black bars visible) film the blobs are more apparent as they are on a blackish background. My PJ is approx 10ft from a 6ft wide 16:9 Draper Luma screen and the blobs are towards the bottom left hand side of the projected image each about 6 to 7 inchs in diameter. Has anyone got any advice?