I pre wash but simply as I do any of my other laundry. Warm water; regular detergent; toss in the dryer until done. Granted, it's usually a wrinkled mess at that point, but, oh well. Just part of the process for me. I come from a garment background of a bazillion years ago, so pre-washing was just 'what was done'. Haven't changed my habits. It works for me.