I've attached a magnet to my pump with a zip tie. The magnet holds a small combination end wrench (open on one end box on the other). I leave the little screw-on washer thingy on my presta valves. When attaching the pump head I slip the box end wrench over the valve. I can use the wrench to press down/away (on the washer) while I pull the head straight up. If I forget to use slip the box end on... the open end works fine as well.