Have ds1 23months and ds2 10months who sleep in the same room, both seem to like company. Problem is ds2 is waking up for the day between 4 - 5.30am, this morning it was 4.10am, luckily he slept through night which has only happened twice recently as going through mega teething session as all teeth coming through at once - still waiting first one! How do I keep him from waking so early? Already have blackout blinds and is in a growbag.