In order to remove the Dri Flo System, you would pull on the elbow that inserts into the rubber cup, leaving the rubber cup attached to your drone stock. Once you have the tube holding the crystals with the elbow on the tube, you would then remove the cap off of the other end of the tube. I find that by pinching the tube a bit that it makes it easier to pop off the cap. Then empty the crystals into an oven safe plate and put them into a very low temp oven until the moisture is evaporated from inside the crystals.