Having said that I have noticed no increase in incidence of spots on my prints since moving to a glass carrier. I was worried about the extra surfaces provided by the glass and the dust problem but it was a non-issue. A couple quick puffs of canned air and it's good to go. If there's spots I spot them. (I find it relaxing.) If the grain on the print is blurry I think it looks sloppy regardless of the quality of the image, and it goes in the trash. For me it was an easy choice once I saw the results.