Cut the cost of cleaning and add these to your shopping basket. Lemon juice (49p for 250ml), soda crystals (51p a kilo) and bicarbonate of soda (48p for 200g). Between them, you will be able to: get your taps sparkling; dissolve grease; shift stains on your work surfaces; and spin out use of your washing detergent. All for less than the cost of one chemical-laden cleaning product.