Other Uses of Onion

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 Clean rusty knives: If your knives are rusting, jab them into a large, raw onion.

 Keep avocados from turning brown: A slice of red onion can be placed alongside an avocado in an airtight container to prevent it from browning. You may also add slices of red onion on top of guacamole.

  Soak up the smell of burnt rice: A great way to get rid of that smoky smell from burnt rice is to place half an onion next to the stove to absorb the smell.

 Ward off ants: If ants are a problem you face at home, leave a bowl of raw onion slices out. The scent should ward them off.

 Create a DIY dye: While onions appear translucent in color, they make a beautiful vibrant red or orange dye. Just gather the skins and place them in a pair of nylon pantyhose or a nut milk bag and tie a knot at the end. Boil them in a pot for about 20 minutes. The liquid should be a bright dye, perfect for paper, yarn or fabric.

 Polish metal: Prepare a mix of crushed onion and one part water. Then, using a damp cloth, rub the mixture on a metal surface, until it appears shiny and clean.