11-05-2012
You can use the windex or air brush cleaning fluid as a leak check, pour it over the tip and behind the needle and see if air is coming out where it isn't supposed to. There are some inside seals but they generally don't go bad unless someone has jammed something in there and scarred the seals somehow.
Another fabulous post from the U.S.Department of Wild Imaginings, now in spectaclar stereo, sponsored by the Adhesives and Sealants Council, suggesting ways to stick things together since the 1800s. Not fabulous in a gay way. Your results may vary. Illinois residents add 8% sales tax. These posts have been made by professional post makers, do not try this type of posting on your own without extensive training, lovely assistants and a trusty clown horn.