Just received my enema syringe in the mail. It came unpacked with no instructions and with two dents in the side. No big deal, but not an auspicious start. I couldn't figure out how it worked, so I came back here and read the entry. When I tried to remove the top to fill the cylinder, discovered it had been cross threaded and wouldn't come off. I can't review the product's performance because I can't get the top off. I'll get some big pliers out and see if I can fix it, but a disappointing start.