Absoluty bro, don't get it hot mind you. You don't want it to burn, just warm it up some to thin it out. Avoid letting tap water get near the needle and keep it capped. Let the water flow off the side and towards the other end. Completely safe. You can also do the same thing with your vials before drawing, you just want to avoid running water over the rubber stoppers on the chance that a very small amount makes it through a pinhole.