Step 1: Before use, open the lid to take out the Accessory Tray, Stand and Bottle Tray. Then, measure 70ml of clean water with milk bottle and pour into the Bottle Chamber. Step 2: To sterilise bottles, first invert the bottles and place them onto the Bottle Tray. Then, lower the tray into the Bottle Chamber. Step 3: To sterilise your accessories, such as nipples and pacifiers, place them onto the Accessory Tray. Step 4: Close the lid completely. Step 5: Depress the Power-On switch. The Light indicator will lit and the sterilizing process rund for 9 minutes. Step 6: Easy Maintainance Bottle Chamber can be detached from Heater for easy cleaning.