I have also had problems with dust blobs on my SE2HD. I have had some success blowing them off with canned air, but it involves taking the cover off (don't tell the factory guy). Make sure your projector hasn't been running for a good long time before you try anything. When you remove the cover of the projector you will see 3 wide flat cables leading to the LCD's. This is where you want to focus your cleaning efforts. Be carefull with the canned air! Use short bursts and only in the upright position as they can expell liquid that can damage your LCD's. My blobs are usually green, so I assume that they are on the green LCD. My unit has colored stickers on the cables indicating witch is witch. I am not recommending that anyone try this. I'm just telling you what I did.