To mimic what Iddee said, people, please use your smoker before going in and keep it handy.
There seems to be this wave lately of people having pride in the fact that they don't use the smoker, or only use it on certain hives, whatever.
Smoke helps you control your bees, masks alarm pheremone and helps you have the upper hand when they get pissy.
What I do when a hive is hot and pissy?
Smoke the living daylights out of them, this will teach most to conform.
A hot hive is imo, one that consistently goes for the jugular, they always on every inspection require lots of smoke, you constantly have to smoke them at every turn in order to get through your inspection, they always seem to be willing to put up a fight.
A hive like this is just no fun to work and should be re-queened.
With that said, I've had some that I've given third and fourth chances to that became workable and reasonably friendly.
I think we owe it to our bees to ride things out a bit before throwing in the towel and requeening.
Sometimes its a transition thing, perhaps they are in a supersedure mode, or the weather had them pissy, things can and do change with their temperments, so I'm not quick to requeen until I know the verdict is guilty.