helluva... I ride the Zero' by Speedplay as well... I use coffee covers when stopping and walking around... the covers "help" in sand but still are no guarantee... if they get really clogged up and you have difficulty clipping in/out you can squirt 'em with water to rinse 'em out... if you do this BE SURE TP LUBE them when you get home!!! It does work tho to remove the dirt that prevents clipping in and out easily. I use White Lightening on mine every couple rides... a dry lube that doesn't attract dirt...

hope your wrist is OK... ouch...