On Thu, 31 May 2007 12:33:05 -0500, Spehro Pefhany
wrote:

For instructions on cleaning the underside of the scanner glass, go to
www.hp.com/support, select your country or region, navigate to the
support page for your scanner, then click the link to view information
about cleaning the underside of the glass.


I was unable to locate anything. Even the FAQ search for cleaning the
glass makes no mention of any surface other than the exposed surface.
Very lame, they are.