I'm dubious, both from an effectiveness and safety point of view, but it does sound easy so I'm tempted! It's dishwasher tablets again but used a bit differently, so tablet in a bowl of boiling water, oven on at 100F and leave for an hour then (supposedly) a quick wipe round and done
Toxic fumes are a concern possibly, damage to inside of oven? Mine is filthy and FB clearly knows it if it's throwing hacks at me but I'm not sure I'm brave (or stupid?) enough to try it. All thoughts welcome before I ruin my oven!