Relax by squeezing out all the pimples. Fill the head and start squeezing, fill it again and keep going! It comes with a handy bottle of pus and a pipette. When you're done squeezing, heat the pus in the microwave until it's liquid and spray it back through the pipette. It comes with a bottle of pus and a handy pipette with which you can easily refill it. Read the operating instructions carefully!