Also known as bicarbonate of soda, baking soda can be used in place of a commercial abrasive cleaner. It will also absorb odours in the fridge or elsewhere.

Sprinkle on the carpet, then vacuum off half an hour later.

Mix baking soda with boiling water and vinegar to unblock drains.

Baking soda can also be used as a DIY aid, a health product, for killing pests, and as a natural beauty product. These and lots more uses are described in the on-line Baking Soda Book.