When you put a pot of water on, put a wooden spoon over the top of the pot. If it starts to boil up too high, the spoon will pop the bubbles.
bubbles and foam created from boiling water are filled with steam, if the bubble touches something with temperature under 100°C (212°F), the steam will condense and break the surface of the bubble.
To get optimum result, do not use the same wooden spoon for a long time, be sure to keep a couple of spoons on rotation.
