People who do not clean their air fryers risk their devices becoming a fire hazard, the Competition and Consumer Protection Commission has warned. Roughly three quarters of Irish people have an air fryer and many use them every day. Advertisement7% of daily users clean them once a month, while 3% said they never clean them. “It's potentially a lot of oil, it's a lot of grease, it's all of that building up in your air fryer,” she said. “It's all of that building up in your air fryer, then being heated up again and again at really extreme temperatures.