I've got an AHG adjustable rear iris with the 5 color filters. There is a definitive haze on all of the filters, and it's pretty considerable, as you can see clear as day when rotating the filters off center.
Do not use any paper product on optics. Even the softest paper has silica particles and will scratch optical surfaces. If really dirty and removable, a wash with some soap and then dry with the cleaning cloth.
WarWagon - I have a Centra rear iris with all the doodads. I could make a copy of the dissassembly instructions and e-mail that to you. I would need a real name, just in case WarWagon is a nom de plume, and an e-mail address. It will likely be the same or very similar technique.