If you have an iron pan and you have burnt something in it, sprinkle it with salt and let it stand for a few hours, then grab an MPS and rub it over.
To make the aluminum pot shiny cook apple peel in it. Thanks to the antioxidant effect of the apple peel’s acidity, it polishes the pot without damaging the surface.
Use washing-soda to prepare the best water for washing the dishes. Dissolve about 5 liters of water in a table spoon of washing-soda. With this mixture, fat and burnt food residue can be easily removed.
If you wash your glassware and glasses, rinse them with a little vinegar. This will make glass surfaces shiny.
You can remove limescale from the electric kettle and coffee-maker by pouring undiluted vinegar into it and boiling it. After boiling the vinegar, pour clean water into the appliance and boil it again.