All I use is stay flo and I have no problem with bugs or my appliances. One of my girlfriends just got those new high efficiency washer and dryers that are real snazzy and you can only use a certain type of detergent on them. She throws starched pieces in them all the time.
I mix mine 50% and spray the dickens out of my fabric, toss it in the dryer and press it. I put starch on almost every piece of fabric as I use it. Sizing isn't stiff enough for me and my corners match and my triangle points are better. I think it helps a lot with my cutting and piecing accuracy.