Although all the recipes emphasize that before you pour the cake mixture in the form or in the pan, you must first spread it with a little butter and flour it everywhere, but accidents happen. And the most common is that the cake sticks and you can not take it out of the form.
Because, there is always the risk of it dissolving. So what can you do in this case? To mold the cake without dissolving it?
Put the mold in a basin of hot water and leave it until it heats up. Then, with a knife that you have also dipped in hot water, try to peel off the cake around the walls.