I also just let it fray and just rip off the threads. When I wash fabric, I open it all the way up. I find that some manufacturers don't get it rolled on the bolt completely straight. So, I open it up completely, wash and dry it, refold it so there are no diagonal waves when held selvage to selvage, (I usually lose 1-2 inches here - but it has been as much as 3.) Then I trim it with the rotary cutter and iron it and it gets either used then or stashed for future use.