Here is something else that I recently learned.....

If you plan on running the syringe under hot water...make sure the needle cap is on very tight! Otherwise, you can get tap water on the needle...not a problem unless you pull back on the plnger to change needles...now you have tap water in the syringe...not good! I just squirted some rather costly BD product into the sink and had to start over for the day...with a whole new syringe and a new set of needles...of course.