I only buy 100% cotton tee shirts. I wash them in cold water and hang to dry. If it is winter time and the water is icy cold, I toss the shirts in the dryer for about a minute, no longer than that, to warm them up to avoid wrinkles.
I put them on a flocked hanger to dry and put them in my closet afterward. I do not fold them because they get wrinkled. I also do not have a place to keep so many folded shirts. My drawers are stuffed already.
Mine do not grow on the hangers even when wet. I do not put heavy sweaters on a hanger, but lightweight shirts on a hanger cause no issues for me.