I think that removing the crumb tray and giving the toaster oven a good cleaning with warm, soapy water is one efficient method of cleaning. However, a solution of baking soda and water may be used to remove tough stains and residue from the toaster oven's inside without causing any harm to the surface.Hi fellas! I need some cleaning advice for my toaster oven. It's starting to get a bit grimy, and I want to make sure I clean it properly without damaging anything. Any tips or tricks you do? Let's share our cleaning hacks!