A few little points to add here.
Re-using needles isn't a good idea, as everyone knows. If you absolutely have to, there are some less risky ways of trying to clean the syringe. You need to understand that the syringe will never be completely cleaned onced its been opened from the packet. All you can hope to do is reduce the amount of bacteria and other nasties, not eliminate them totally.
Cleaning a syringe with hot water/bioling water will not get rid of virus material. In fact, hot water will coagulate the blood inside the needle, making it basically encased, and almost indestructable. Never use warm/hot water to clean out a syringe. It will do more harm than good.
Also, bleach (of any strength) has never been proven to kill viruses like hep C. Hep C (and hep B) have very tough outer layers, that bleach may not penetrate. It is assumed that bleach will kill hep C, and it is still considered the best disinfectant for killing hep C, although its yet to be fully proven. Recently, we have heard that common household dishwashing detergent may help breakdown the outer layer of hep C virus, although its yet to be proven as far as we know.
So for now, the "safest" way of reusing a needle is known as the 2 x 2 x 2 x 2 method.
Rince the needle and syringe twice with cool water (ideally water thats been boiled and left to cool) , twice in detergent dissolved in cool water, twice in 10% bleach solution (and shaken for 2 minutes) and twice finaly in cool water again. Line up 8 glasses on a table (with 2 of each) and way you go. Change water/detergent/bleach with each needle/syringe cleaned.
Now, please remember that this is in no way a guarantee of removing virus material from used needles. Once a neelde is removed from its sterile packaging, its never going to get completely sterile again (unless autoclaved). All you are doing is reducing the amount of virus material present.
The best bet is to stop yourself getting in this situation in the first place. Stock up on needles whenever you can get them. Aside from the risk of blood borne infection, needles get dulled from one use, so bruising and problems with veins will get considerably worse with subsequent shots from a used needle.
Its really disturbing hearing what folks in the US go thru getting needles. Here in Australia, needles and syringes are readily available eveywhere, so theres no excuse for Aussies sharing
Check
this link for a bit more of an overview of hep C and injecting drug use.
This link has heaps of info on HIV, hep C, B and A. Really good info.
[ 03 December 2002: Message edited by: hardup ]