Most people have no idea when to use the recirculate button.
Once the cabin is cool, leave it on. Your AC keeps recycling already-cooled air instead of constantly cooling hot outside air from scratch.
That means less heat load, faster cooling, and less work spent fighting the outside temperature.
Think of it like the difference between trying to cool your house with the windows open vs keeping them closed.
@Grummz Grumz only your bum ass and other likewise losers will bitch about this, you wouldn't know a good game if it slapped away your jerking hand, your fatass never made anything of value despite all these years of rotting away and collecting money and you never will.