I am new to owning a projector. I have a DLP projector but have already had experiences with the dust blob. At first I had no idea what they were. I noticed a few small perfectly round fingerprint looking circles only when the screen was completely black on the first projector that I had. I actually returned that projector for this reason because it was shipped to me with the dust blobs. My new one still has a tiny one that was also shipped to me that way but it's barely noticeable unless the screen is completely black and I really look for it.
I just don't want to become obsessed worrying or looking for these dust blobs. I checked into an online service that cleans projectors for like $200.00! That seems very unreasonable to me and I don't feel comfortable breaking into the projector to try and clean it myself if I get more dust blobs in the future. For all of you guys who have spent over $2,000 on a projector, do you ever worry or get concerned about getting dust blobs? Is there any good online service that will clean a projector for a reasonable price?