Professional tips for making bath bombs
Professional tips for making bath bombs: * Be sure to use liquid food colouring, not gels. Gels will clump together when you add them to the bicarbonate and it's hard to mix them in. * Once you've added the liquid to the mixture, you need to work quickly to mix everything together and push it into the mould as soon as you can. * To allow your bath bombs to dry, leave them uncovered in a cool, dry place (away from taps and humidity). They will take longer to set in humid weather. * If you've got more than one colour, why not make a rainbow bath bomb? Layer up the different colours and they will blend together beautifully. * The reaction citrus soda with the bicarbonate of soda is what makes your bath bomb fizzy.