The Lunette menstrual cup should be emptied on average two to four times a day and can be used during the night, although you should not exceed 12 hours at a time.
First, wash your hands with soap and hot water. You can insert the cup while sitting, standing or squatting; spreading your legs will facilitate insertion. Fold the Lunette menstrual cup in on itself to make flat, then in half. Keep it rolled up and guide it rim-first into the vagina. The cup is held in position by the seal formed with the walls of the vagina and pressure from the vaginal muscles.
When removing the cup, first wash your hands and relax your muscles. Break the seal by squeezing the bottom part of the cup, until you feel or hear the suction release. Now gently rock the cup from side to side while pulling down. Pull the cup out while pinching the ridged bottom of the cup. Tip the contents into the toilet.
After emptying, rinse the cup in cold water first to avoid the development of odor and discoloration. Afterwards, clean the cup with hot water and the Lunette Feelbetter Liquid Wash or a mild, perfume-free soap. Then the cup can be re-inserted in the vagina.
See here for more detailed instructions.