Leave the mixture on your face for 5-10 minutes. Do not leave it on overnight under any circumstances.
Rinse with plenty of warm water until all the product is removed, then immediately apply your usual moisturizer to soothe your skin.
Important precautions:
This is a harsh mask and is not suitable for sensitive skin, rosacea, or active acne. Lemon juice is highly photosensitive; if you expose yourself to the sun with traces of lemon on your skin, you will suffer from severe chemical burns and permanent dark spots (phytophotodermatitis).