I wash everything fabric that comes in the house.Clothing, fabric, anything made from fabric that can be washed is washed. I was at my LQS and I was talking to one of the owners about pre-washing, she told me that most people don't pre-wash and I picked up a bolt of fabric and held it out to her and asked her to smell it. She knew that I had lots of allergies and she understands that I prewash all the fabric that I buy from her. The smell of the chemicals give me a headache, so I just wash fabric. No big deal for me.