I never wash mine unless there is poop on them. If they come out of the nest clean, they go right in the carton. If you wash them, you remove the bloom, the coating they are laid with, what resists bacteria to a degree. Actually you are not supposed to wash them. You dont eat the shells, right?
I agree we never wash ours and very seldom do we have a soiled egg if so a paper towel and some water will clean it up.