Here's a ghetto solution that works every time for me...get some plastic shopping bags. I save all my bags from when I go grocery shopping, so I have plenty lying around. Just pull them up over your feet, and secure them at the ankle using your pant leg strap, or a rubber band. Once they're on good and snug, you can make a little tear in the sole where the cleat protrudes. Looks like you're homeless, but it really works well.