Also, a queenless hive will usually be more aggressive. So if you have a hot, now queenless hive, they are probably going to be bonkers.
Whenever I have to do anything invasive to certain of my hives, I'll have a bee or two that will be on the prowl for me. Since a requeening, it has gotten better for me too. Now if they come after me I'll wave my hand around and catch the attacking bee in my hand and sacrifice a sting rather than have her pestering me all day.
It does take a while for a turnaround, upwards of 6 weeks before its all better.
Rick