Clean glass on cannon mp960

SOURCE: Fog build up on underside of glass plate.

I made contact with cannon and received this reply. I was satisfied with the answer but the question still remained on how to remove the glass should i wish to do so. Also after there answer... would there then be a problem if i did clean the reverse side. Their answer was initialy this...
The foggy haze on the glass is actually an anti-glare treatment that has
been intentionally applied to the underside of the scanner glass.  This 
treatment lessens the glare from the lamp under the glass and provides 
better image quality.  This haze may not appear uniform because of the 
shape of the scanner base and the components under the glass. However, 
the anti-glare treatment has been uniformly applied and the haze is as 
expected.  The treatment should not affect the scan quality or output of
the 8600F.  

SOURCE: I need to clean the underside of the glass on my Canonscan Lide20

How on earth did the underside of the glass get dirty?

Ok, never mind that... in the end, it's NOT worth it. In the old days, you could have since scanners were as big as printers are today... but now they are definitely NOT designed for the consumer to service. The scanner is designed for accuracy, even if you were to get it all apart, the odds that you maintain the precision and integrity of the bulb, the track on which the bulb moves, etc, are very slim.

Suggestion... How is the printer you have holding up? If it's getting on in age, it may be a wise investment to purchase a dual scanner/printer (as long as you are spending the money).

Hope that helps :)

-- RT