I don't know much about denim care because I don't wear jeans much, but I suspect that if you don't wear anything but jeans, particularly designer denim in the $200+/pair range, then you might need BluWash for cleaning them.
BluWash is a patent pending formula that protects your high-end (and low-end, if you care that much) denim during laundering. It does it by neutralizing chlorine and other chemicals used to process water. Apparently, BluWash doesn't just wash your jeans, but actually revives them.
I would hope so. A 32 ounce bottle costs $22. Available from ShopIntuition.