If you do not have access to water, put the device into a re-sealable bag or the container it came in , and wash it later. Before you start to pee, look and make sure you are aiming onto the ground and not onto concave objects. If you go too close to any of these places, you risk contaminating the water supply and spreading illness. Mullen is a very good leaf to use. Just because you're on your period doesn't mean you can't pee. Be sure to wipe yourself clean, or you may get an infection.