Mix baking soda with water, spread on your oven tray or whatever and leave to dry. Then rub (not rinse) off with steel wool or seomthing similarly abrasive. It dries out the dirt which then falls off when you rub.
It does the job just as well as those nasty, dangerous, poisonous, fat dissolving, vile smelling oven cleaners.
Yes it is a highly useful and versatile substance. One of its uses has even been pointed out in popa’s mice in my house thread by purim mashgiach… to put out a bowl of baking powder and a bowl of vinegar, go to bed and the mice will soon be history!