This is an old hack that many don't know and it's cheap. Throwing a couple of tennis balls in your pool is a great way to assist with removing surface oil from lotions, makeup, body and hair. All of theses oils can lead to cloudy water and the depletion of your free chlorine levels.
What occurs is the oils get absorbed into the tennis balls’ fluffy surface. Newer tennis balls work better than older ones - Give it crack!