I've been cleaning the panels with a lens wipe, alcohol if needed and razor blade for the really bad ones. Then I use a lens wipe, brush, and blower on each panel before taking pics. I also brush and blow off the polarizers. The speck could be on the light table below the panel; I bought a copy stand, so I can use a larger aperture to get more depth of field so that the segments are in better focus. But that means that more dirt is in focus, too. I'll make sure I clean under the panel more often. I can also change out polarizers; I can't use most of the ones that come with the games because they are so worn, so I bought a pack of new ones to use instead. But they are pretty easy to scratch, so I change them out every so often.
I was trying to get pics of Hook yesterday, but the segments weren't getting turned on strongly. I'm wondering if it's from the cold; I left the panels in the basement, and it's a few degrees cooler down there. So I brought them upstairs to warm up, and I'll try again later. Or maybe the Hook panel is damaged.
