I never rinse mine. After I crack them and use them I set them in the container... making sure they aren't nestled together so there is plenty of air flow to dry them. It's almost like doing a fun little puzzle.Ok, I rinse them, then let them dry a bit on a paper towel...but when I put them in the container, they are always leaking the sticking egg whites and they stink inside that container. Do need to do more than just a rinse?
If they nestle together they will mold in about 2 days here. My whole family knows to make sure their egg shells stack with air spaces in the disposal container.
To me... rinsing, running through a processor, oven baking, etc... is spending more energy and consuming more resources and working AGAINST my goal of being more green and more self sustaining.
I haven't YET had ANY contamination type issues. And can't help but wonder of the little bit of albumin dried onto the shells even increases their nutritional value SLIGHTLY. Even if not, no wasted water or time on my part rinsing them.