Yes. It is basically outgassing from the interior components, lubricants, plus some exterior gases....basically fog. Just for fun ask Epson ( actually the Epson repair place near to you) how much to clean it... you will be amazed! Cheaper to buy a new unit....! Frank Filippone red735i@xxxxxxxxxxxxx Can the underside of the scanner glass get dirty ------ Unsubscribe or change to/from Digest Mode at: http://www.lrflex.furnfeather.net/ Archives are at: //www.freelists.org/archives/leicareflex/