I’m new to this, so this may be a stupid question but does anyone use the easy prep machine and think it’s a good buy? I don’t know the rules with making the bottles up. My friend used to boil the water then put 3/4 boiled hot water leave to cool then place in the fridge then night feeds she would top up the 1/4 with freshly boiled water. She has said this isn’t recommended anymore. What does everyone do? X