How to make perfect frothed milk: Fill one third of a tall mug with hot (not boiled) milk. For cold drinks, ensure the milk is fridge cold. At a single angle, insert the aerolatte whisking head into the milk and down towards the mug's base. Switch on for about 20 seconds, slowly stirring the whisking head from the bottom towards the top of the mug. Remember to switch off the aerolatte frother before removing it from the milk.