You can use Pink Stuff to clean inside your oven. This is another popular all-purpose cleaner that comes in a useful paste form. Although non-toxic, the paste is mildly abrasive which makes it a useful tool for removing grease stains and burnt-on food. Spread the paste across any affected areas, or the entire oven if you wish. Leave to soak in and then return with a non-scratch scourer sponge to remove the residue. You may find that you’ll need repeated treatments in order to properly clean the inside of your oven this way.