Officejet Pro 8500A has dirt on the underside of the ADF scan glass

[Larry_H]

I've got a Officejet Pro 8500A that has got dirt on the underside of the ADF portion of the scanner glass.  This means that there are streaks when scanning documents from the ADF.  Does anyone have directions on how to get access to the underside of the glass to be able to clean it?

Any info would be appreciated. 

[CharlesHP]

The ADF scanner is supposed to be sealed well, to prevent things like this from happening. If it is still under warranty, you might consider it be serviceb by hp service center. However, if you want try yourself, the scanner glass is hold down by the frame with maybe half a dozen hex key or alan key bolts. Try a can of compressed air first, and if hae to wipe it off, use lint free cloth.

[Larry_H]

Where are the bolts?  I didn't see them.  Do I have to pop of the plastic from around the glass.