I am new to quilting,having just started this past summer. I am just now finishing my 6th project ( a King size quilt) I have also made 2 lap quilts and 2 table runners and a large wall hanging. I have only pre washed my fabric for a flannel lap quilt. (and what a mess with all the unravelling) I have since washed the table runners and they came out fine. Two of the ladies at my local quilt shop said they never pre wash.Most of my books say to pre wash but some say they don't pre wash. Any opinions on what is right?