I've never had to use hot then cold. All I do is use hot water, a pair or two of denim jeans, and small amount of detergent. I check it every 10 min or so and when it's as small as I want I take it out.
If your bowl is too big it may not have anything to do with felting. It can only felt so much as far as I know.
Last edited by Jan in CA : 06-08-2010 at 12:47 AM.