I have a teflon iron cover similar to this one.
http://www.joann.com/joann/catalog.jsp;jsessionid=PKLFCG2PD2ZG0P4SY5LVAFJ50LD3UUPU?CATID =cat2955&PRODID=prd3110&_requestid=959148
I have it on the iron all the time, it's great for ironing any fabric. No fabric melts or gets shiny, and nothing sticks to it.