1. Apply as your last layer of protection in the morning (it works great over makeup!) and reapply at least every 2 hours throughout the day for continued protection.
2. Be sure to check that the cap on the bottom of your brush is screwed on tightly to prevent powder from spilling out. It may come loose with normal use.
3. Taking your brush to the beach? Apply and reapply to completely dry skin, as contact with water can cause the brush to clog.