How often should I use this sheet mask, and when is the best time to apply it?

This mask is intended for occasional use as a quick skin reset, not as a daily treatment. For most people, using it once a week or once every two weeks fits well into a balanced skincare routine. The suggested times to use it are before an event when you want your complexion to look fresher, after a long or tiring day, during periods when your skin feels both thirsty and congested, or after travel when skin can look tired and uneven. To use it, apply the mask to clean, dry skin, leave it on for the time specified on the packaging (typically 15-20 minutes for sheet masks), then gently pat any remaining essence into your skin. You can follow with your regular serum or moisturizer if desired. It's convenient as it requires no mixing and leaves no complicated residue to rinse off. If your skin is very reactive or you are new to charcoal or hyaluronic acid, consider patch testing before full use, and always discontinue if any irritation occurs.