I'd appreciate any advice from those who have attempted this. I have the common problem of lines across scans made on my Microtek 1800f - see photo, which is a small crop from an 8x10 neg. I have taken the glass cover off the scanner to clean it, but what on earth do I actually clean and how do I get at it? If anybody has ever attempted this I could use a tutorial.

Thanks for any info!

Dave