[mdowell]

Have someone turn the washers on, and when it is up, grab it. There is a tab (you'll need a small straight-slot screwdriver) that you'll need to lift to get the old one on. Then just slip the new one on. The whole time you will be gripping the base of the washer that will want to go back in it's hole.

Once that is done, never use them again. Those things are overpriced, and under-engineered.