Out of all the syringes I own, only one performs flawlessly every time. It's made in Denmark and I did a little research: It's made by BAXA ExactaMed and can be found on Amazon, Ebay and other sites. They're available in all sizes and graduations but I have not seen one with a luer lock, if that's important to you. They are latex free, oral syringes and never stick. Since I own luer lock needles or blunt tips I had to create my own collar in order to fit the tip securely to the syringe. There is an old trick using a moistened, thin strip of U.S. paper money. Wrap it around the slip tip enough to tightly secure the needle tip. Of course, it would be ideal to have a needle compatible with a BAXA slip tip. If you know where I can find one, please let me know. Thx.