Worst Air fryer ever!!!!

Worst product EVER!! Bought a Air fryer oven over R3000 on special , that should have been the warning. After its first use the crum tray that protects the elements got dirty like it would and I could not get it clean again. The sides of the oven looks like white rust. and its not getting off while just using a soft cloth and no luck. The oven gets so hot that you struggle to touch the buttons . Money wasted so much money!