Just keep a glove in the back of the car in a zip lock bag. It's not messy, but it will leave a smell on your hands if you don't wear a glove... Like others said, stay away from dirty pumps. I've never had it on my clothes, just my hand if I didn't wear a glove. You can keep a few throw away exam gloves in your car as well... and just throw them away after each use.

Craig