I have not yet encountered any out-gassing of electronic components or plastic affecting scanner glass in any of the scanners I've ever owned. Not to say it can't happen, and good that it is correctable.
I had this problem with a Canon Canoscan 8600F. Annoying, but only really visible when viewed at an angle, so I wondered whether it truly affected image quality.
Please note my point, I have safely removed and cleaned the scanner glass as many others have. It's not rocket science.
This is madness. Scanners are assembled in a hygenic environment. If you open one at home you are bound to introduce dust, which will affect your images far worse than outgassing.
I have some experience of this. My V750 came with a small speck of plastic on the underside of the platen, right in the middle. I sent it back to Epson three
times to get it cleaned, and each time it came back with more and more dust accumulating under the platen. In the end Epson, to their credit, agreed that cleaning the underside of the platen was impractical, and replaced the unit with a brand-new one. Good stuff, Epson.
Please don't encourage people to open their scanners!