Candling was a bad idea :)
- Innocent Bystander
Hi Lavender, Welcome to BYC!
It's fine to leave your eggs in until checked on day 10, many people leave them in until lockdown as long as there is no smell or weeping.
Glad you got your humidity down a bit, 40% is not bad. One thing you can do is check your air cells by drawing a circle around it on day 7, 14, and 18 to check progression. They should look something like this:
If your air cells are smaller on day 7, you need to lower your humidity a bit. If they are larger, you need to increase your humidity.
Good luck! And I hope you have a great hatch!