In order to provide the best protection from the sun, you need to know how to properly apply sunscreen to the skin. You want the best broad spectrum sunscreen that is water-proof so that it stays on the skin while swimming or doing activities that cause you to sweat. Make sure the SPF level is high enough to provide protection for your skin type. Children should have a higher SPF coverage because their skin can become burned easier than adults.
Don't apply sunscreen right before going outside. It takes about 30 minutes for the sunscreen to settle into the skin. You want to apply the product about half an hour before you get in the sun. Once you're outside, you should reapply the sunscreen every 30 minutes depending on how much moisture is on the skin.
Before using the product, you want to shake the bottle so that all of the proper chemicals that provide protection are blended. You don't want to use a sunscreen that has a lot of water at the top of the bottle as this will be what you put on the skin, which offers little to no protection. At times, the sunscreen might have clumps around the top of the bottle. These should be removed as they won't be of any benefit to the skin. A sunscreen that is sprayed on the skin is often better so that there aren't any issues with clumps or having the liquid blended together.
Make sure enough sunscreen is applied so that you have the best coverage. You don't want to apply sunscreen only to the face and arms while leaving the back and legs without any kind of protection. Don't apply a thin layer of sunscreen if you plan on being outside for a long period of time. A cream is sometimes best as you can see where the product is applied on the skin instead of guessing as to where it is, especially if the product is used on children. Use the sunscreen on all parts of the body, including the ears, forehead and the backs of the legs as these areas are exposed to the sun as well.