How to skim whole milk?

You place the milk into a pot and bring to a boil. Turn the flame off and let the milk sit for few minutes. You will notice the a film has formed on top of the milk. Use a spoon with holes and remove that film from the top of the milk. Turn the heat on again and bring to boil and turn off and let the milk sit until the film forms again. Do this procedure at least 6 times to get 2% milk and few more times to get 1% milk.