I have a pair of raw denim I have yet to wash. I want to wash them as they are too long and at the same time I would like to try and stretch the jeans a little if I can. It is tight but fits well, I would be happy if it stayed the same size and even happier if it had a little more room. How do I do it? Do I stretch while washing? when it is drying? any recommendations would be appreciated. Thanks al lot.