I starch before I cut, after I sew, and I read to starch before quilting two or three times as it makes the fabric slide. Basically whenever I generally pressed, I now starch and press. I don't have a problem with crusty fabric. I am working on two quilts, one that I haven't prewashed the fabric and I still starch that one.
There is a starch you can make that contains vodaka that is suppose to work really well, I wish I could find it.
I was a bit embarrassed by my backs, but they look good now that I have started starching. It is a big difference, I was surprised.
I want to try turning the head 90'. Do you only do it when quilting or for general sewing?