Need advice please. I have a Pekin duck egg left from a batch that hatched 4 days ago. Day 28 was 15 May, so it’s now day 35. I can see the chick moving but still not internally pipped, looks like it’s trying. Temp 37.5 humidity 80% now down to 70% as read that was too high. Lid has been opened a couple of times to let other ducklings out. I had to help 2 as they had pipped but not zipped and that was after 48hrs they are strong and happy. Any advice welcome please.