Hi all, I bought a Sanyo PLVZ2 projector recently. All was fine initially, then I noticed round dark green blobs appearing on the picture in various places on dark scenes. This got progressively worse in during the first week of owning the projector. I returned the projector to my supplier who immediately swapped it for another machine. He didn't know what was wrong. However on the new projector after a day of use, I notice a very very slight green blob on the picture (not as bad as the last one)which can only be noticed if I press the "no show" on the remote and am presented with a black screen. My concern is that this replacement projector is showing a similar problem, which may get worse. I see that dust blobs has come up a lot in conversation in these forums, is this the same problem? As it makes no difference to the picture if I clean the front of the lens, I can only guess that if it is dust then its gotta be inside the unit. However is this something I can clean or does it need a qualified engineer. My problem is that in less than a week these blobs start appearing. I wouldn't consider my lounge to be a particularly dusty area (I am also a non smoker), so why is this happening? Any advice on what this could be / instructions for cleaning would be gratefully received.