I've been quilting a long time.... since 1990's and been sewing a lot longer.... since 1950's. I had never used starch for quilting until a few years ago.... and I only use it if the fabric frays easily or is really limp. Anyway, when I started using it on the advise of my LQS, they told me to use sizing instead of starch. Starch is flour based, sizing is not. Rodents and bugs like flour.... it's food to them.... so they might like to feast on your quilt or starched stash if they get the chance. Since I spend 6 months at a winter home and 6 months at a summer home, I'd rather not take the chance on anything happening at either place. Maybe it's not as big a problem as the LQS suggested but, I always use sizing and have never had a problem so far.