How do you clean your eggs?
Relatively new to chicken keeping but having fun 
People have been asking for eggs from our rescue chickens and we have plenty but I am reluctant as I don't want to make anybody ill. Their coop is kept clean but there is usually some dirt on the eggs.
I've been reading about the bloom on the eggs which protects them. I've also read about spraying with a sterilising solution but can't seem to find out what that is.
what is the best way to clean dirt and poo etc off the eggs and does this affect how long they can be stored?