I pre-wash my batting. I use Warm and Natural or Warm and White. I put it in the washer with hot water but leave the lid open so the washer won't agitate. I let it soak for about a half hour. Then I switch the washer to spin and spin it out and put it in the dryer. I love to hand quilt and the batting is softer and easier to hand quilt. I also don't like the puckery look if I can avoid it and this helps.