They are going to germinate soon. Though i put mine on a higher up shelf and the humidity thing works itself out and i dont have to be home all day to check as those things dry out alot faster than i thought they would so i do everything you did except i put them on 10 inch paper plates and put those inside a plastic bag, which i leave open. They dont dry out unexpectedly and 3 days your going to get germination regardless, unless there is something weird and out of the ordinary you didnt mention. Also, if they are all the sane strain, i tend to use 1 plate, takes up less space and they are all in the exact same environment, Good luck!