Good points. I just wanted to add to make sure you turn the flow control knob tightly off every time you are done with it. And never leave an empty can on it, change it quickly. I leave a can on mine permanently so its always ready to go. Can use a tiny amount then then close the flow control knob off. I have let mine sit for over 6 months with no issues. I only clean it rarely when I don’t have a fresh can to put on. I have only gone though two foam pistols/guns in 15 years. I would never use the normal cans again. Way to much waste.