I’ve learned that not wearing pyjamas just soaks the bed with sweat, so might as well wear them and just change them out in the middle of the night as and when needed.
I’ve learned that sleeping with the window open only does nothing but ensure that I hear the birds at 5 in the morning
I’ve learned that a decent blindfold works better than any curtain
For the hot humid nights the only real solution is air conditioning, we’ve had it for the last three years and it‘s bliss!
However… we also:
Thanks to all the above we have not needed the AC so far this year.