I had 2 air fryers before and both of them had problems with food sticking to the tray.  They claimed to be non stick but they were not.  When I read that Ninja has a ceramic easy to clean tray I had to get it.  I love my air fryer! I think it's the best one out there.  You can tell there is a difference in quality.  Food does not get burnt and stuck on to the tray or the basket.  You just easily wipe everything off.  I even hand wash the tray and basket because it's so easy.