Mix baking soda with water in a ratio of 3 tablespoons to 1 cup and use to scrub the greasy surface. Baking soda is one of the most effective substances to remove grease because it is alkaline. It is also gentle on your skin.
For glass cookware, try filling with water and adding 6 Alka-seltzer tablets. This needs to soak for about an hour before the grease easily scrubs away. To remove baked-on grease from an oven mix a paste of dish soap and baking soda, then paint on the inside of your oven with a pastry brush. Let this sit for a few hours, then scrub off. Vinegar also softens grease on a stove top which assists the cleaning process.