Is it really worth it to clean the inside glass of an Epson 4990?

[Paul H]

I cleaned the glass on my old 3170, and it did make a difference to the scans. Seeing how easy it was to dismantle, I did it again, this time fixing black-out material on the inside base of the scanner, and that too made a visible difference.

The most difficult thing is to make your environment as dust free as possible, and you should make sure you have a good anti-static cloth.

[Doug Fisher]

>>is there any way to look at that pdf without having a yahoo mail account?<<

Check your email.

I don't know which scanner you were referring to, but I do have the exploded diagrams up on this webpage so you can go find the one you need.

http://www.betterscanning.com/scanning/dismantling.html

[Frank Petronio]

Thanks for the instructions Doug.

You know what though? I can't see any real problem with the scans I am getting... I think I am going to let sleeping dogs lie until I get a chance to do a test with somebodys clean 4990 or maybe a 750 somewhere. It sounds like a lot of hassle without really being sure of the benefit.

I'm surprised that nobody has done a simple test.

[Rob Champagne]

you can fix it in photoshop if the scan is veiled