It’s too embarrassing to say how many years it took me to realize this – but you can cut out washing up burnt-on grease on casserole dishes and baking sheets…. simply line them with silver foil before putting them in the oven.
When you’ve lifted out your delicious ovenbaked goodies, simply leave the oven dish to one side, to cool (so the fat/sauce solidifies). When it’s cooled, scrumple up the foil and put in the bin.
Bonus: you don’t clog your drains washing up the fat remnants on the dish.