If you start seeing white smoke coming from the back of your air fryer while you are cooking your burgers don’t be alarmed. This white smoke is produced when the fat from whatever you are cooking in the air fryer hits the bottom of the pan. Items with higher fat content tend to produce smoke (this is why I’ve given up on making air fryer bacon!). I make my burgers with lean ground beef to reduce the amount of fat that drips out as the burger cooks but if there is some smoking I stop the air fryer and carefully wipe up the grease from the bottom pan (be careful it will be hot!) before returning the burgers back to the basket and starting the air fryer again. I'm going to be honest, with burgers you're always going to get a little smoking. It's just the nature of the beast, but using a leaner meat makes a big difference and you still get an amazing, juicy burger!