My linen sling was SO hard to adjust the first time I used it. Even after one wash in the machine (and line-drying) it was tons better. I've been using it about 2 weeks now and it's getting softer every day. I love it!

I use Charlie's too, but we don't have hard water. I've heard there are some special instructions for hard water that might help. Have you tried searching on the Charlie's website?