Incorrect use of sunscreen products poses a threat to the health of the skin.
Particularly in the summer, sunscreen products should be applied on dry skin, at least 30 minutes before sun exposure and in sufficient quantity. You need to reapply regularly, at least every 2 hours and definitely every time you get out of the water or sweat excessively.
For an adult, the recommended application is 5mL (approximately one teaspoon) for each arm, leg, body front, body back and face (including neck and ears). That equates to a total of 35mL (approximately seven teaspoons) for a full body application.