I can see where starch would help if you are cutting, but my problem is I can't see the edge of the fabric under the ruler!
I've had to resort to taping fabric down on a line on the mat so I could line it up. I have a Martelli mat on the yellow side and still can't see. Not using Omnigrids but the other brand with no color marking. Also have the Quilters Slidelock.
Fixing lighting. Have to find a gooseneck that fits the track over the cutting table.