I just purchased the above named batting and it says to not wash before using. It will be a 3 percent shrinkage when you do it as part of quilt. If you want to do before anyways, it's hand wash, cold water, mild detergent, do not agitate, soak for 20 mins, then rinse in cold several times, Squeeze in water, do not wring, rolling in a towel will help. Dry in warm dryer or lay flat to air dry.
HOW to you people that have been using it do it? I don't want alot of wrinkling in my finished quilts. I always wash the fabrics first..