Copper cleaner

Here's how to make your own copper cleaner.
50g of flour, 50g of salt, 75g of detergent, 15cl of white vinegar, 5cl of lemon juice, 10cl of hot water.
Mix the flour, salt and detergent in a big glass bowl. Mix the other ingredients and stir. Put the mixture into a glass jar and put a label on it. Keep out of reach of children. Shake well before using then put a few drops on the copper and rub with a cloth. For tough stains, use a tooth brush.
Rinse with tap water, dry and polish with a soft cloth.