You can saves money, reduces waste and reduces chemicals in the home by cleaning with “edible” cleaners Cut a potato in half, dip the cut end into a flat dish of table salt and rub it all over the rusted areas of metal pans. If the potato becomes too soft, cut it again and apply more salt. The oxalic acid in the potato helps to dissolve the rust by reacting with the iron in the metal to form ferric oxalate, which in turn dissolves in water (or, in this case, the creamy potato starch). White bread is highly absorbent so attracts other matter such as dust and grime. But the yeast, flour and water inside the bread leaves no residue — so your beloved pictures are safe if you use a slice as a duster. Rub a thin layer of ketchup on the surface of dull or tarnished copper and stainless-steel pans. Leave for 30 minutes. The acetic acid (a weak organic chemical that gives condiments a bitter taste) in the vinegar in the ketchup will react with the tarnish and remove it. Mix pure white vinegar with an equal amount of water and pour it in a spray bottle. Then spray on to the surface and wipe off. The acetic acid inside vinegar has been used as an anti-bacterial agent since Egyptian times. When dissolved in water, it breaks down into hydrogen and acetate, both of which weaken stains.