I am loving Win Detergent also (thanks Silver!). I've found if I auto-order it through Amazon, it's really cheap. I get 4 bottles every 3 months for $17-something per shipment. They discount it for the auto-order and they don't charge shipping. You can also change your mind at any time and order quicker if you run out or postpone an order if you don't need it.

I'm using Win for more than my cycling stuff actually. It works on sheets and towels and all sorts of laundry