i used milton and it made my hands all rashy even though i wore gloves i would still get some chemical on me from thebottles at some stage. I boiled ont he stove and kept burning myself so i borrowed a microwave steam steriliser and it was fantastic, so quick easy and painfree! Next bub though we will not be sterilising just washing in hot soapy water, rinsing in hot water, air drying.