I bled my Magura about a month ago, I got my Dad to help me bleed it with water and antifreeze, went and put it onto my bike, and had a quick test to see if it had sorted itself out. It started braking pretty much as soon as I started pulling the lever, but I went for a ride the next day, and it took slightly longer to start braking. This kept happening a little more every day, and by the end of the week it was pretty much back to how it was before I bled it, and the lever was touching the bar with little braking power.
Is there a leak in the hose somewhere, and if there is, how can I find it and fix it?