Are you using gas or wood? Paradoxically the hottest my ooni has been was when there were high winds earlier this year, this meant more oxygen and greater combustion of the wood.
Gas - I can see that would be the opposite for getting a strong wood burn. I've got other places to play with but was excited to get going and didn't give much thought to the set up.
Which ooni do you have?
If you're using the 3, the best way is chimney cap off, door on - which is contrary to Ooni's advice. Seems less affected by wind IME.
Are you using gas or wood? Paradoxically the hottest my ooni has been was when there were high winds earlier this year, this meant more oxygen and greater combustion of the wood.