To use this MISSHA cushion foundation, simply press the puff gently onto the cushion to pick up the product. Then, apply it evenly to your face for a flawless finish. Make sure to blend it well around the edges for a natural look. As for storage, keep it in a cool and dry place. Avoid exposing it to direct sunlight or high temperatures. Also, remember to clean the puff regularly to prevent bacteria build - up. If you have sensitive skin, it's a good idea to do a patch test on your wrist before applying it all over your face.