I cant see clearly inside my blue and blue/green eggs when i candle. i donth know what are good or bad. nothing stinks yet. how do i know the good from the bad. i see dark masses in them. there on day 7. i also have 2 olive eggs i cant see anything in them and there on day 11. shell is way to dark. do i just leave them till lockdown? is it safe to leave them that long?