Try to suck up a product through the needle and you\'ll realize very well why [img]/ubbthreads/images/icons/smile.gif[/img] It works only on alcohol products. Basically when you try to pull up some APC (example), you pull the syringe lever but only a very small amount comes in. Since you put in the syringe an amount of liquid whose volume is not equal to the volume drained by the pulled lever, you have decreased pressure in the syringe, and the very instant you leave the lever, it will push itself back in its original position.
Ultimately you can win that way too, but once you brought in some amount of product, you realize that the drops produced this way are very small (they have to pass through the needle, which has a small diameter)... In the end you\'ll throw away that needle, or even better, you might opt for a glass dropper.
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