We test microwaves to see how good they are at their main job. For that, we start with tests designed for the microwave mode only. These include reheating rice and toasting bread, using a thermal camera to see exactly how well (and how evenly) the microwave heats. We also cook a baked potato, using a microwave-only mode if that's available, but we'll use a combi mode, adding convection oven or grill, to see how this works. Where microwaves have a grill, we test them with bread and see how even the grilling is across as many slices as we can fit into a product. We'll also test convection oven settings by heating a baking tray full of ceramic cooking beads, and then using a thermal camera to view how evenly the oven heats. If there are other key functions, such as air frying, steaming or crisping, we try these out following suggestions in the manual.