Teflon, the slippery coating used to make non-stick pans, was invented in 1938 by Dupont. It wasn't until 1954 that a French engineer, by the name of Marc Gregoire, managed to find a way to make Teflon stick to aluminium. The non-stick pan was born and in 1956 Marc and his wife Colette began to market the product as TEFAL. Non-stick pans are easy to clean most of the time, but if you have overcooked something in the pan or residue has built up from cooking oil, there are easy ways to remove this dirt.
Fill the pan or pot with water until waterline is one inch from the top.
Add a tablespoon of dishwasher detergent to the water.
Place the pan on the burner and bring it to a boil. Then simmer for about ten minutes.
Take the pan off the heat, empty the water and clean anything left in the pan with warm soapy water and a non-abrasive brush or sponge.
Mix baking soda and lemon juice together to make a paste.
Spread the paste over the affected areas in your pan.
Leave the pan overnight. In the morning rinse your pan with warm soapy water and a non-abrasive brush or sponge.
For really stubborn residue on a pan, leave the pan to soak overnight in warm soapy water and then follow the steps above.
Make sure your kitchen is well ventilated when simmering the dishwasher powder. Open a window or put on your extractor fan. Thoroughly wash your pan after you have done this, to remove all traces of the dishwasher powder before using the pan again.