Originally Posted by creenie
went to have a shot and my dam trusty is blocked.. has sucked up alittle water but will not plunge.. A mate told me the best way to unblock is to run under hot water.. does anyone know of any other way..
So, I wasn't going to reply to this thread, which was started some time ago, but the following hasn't yet been mentioned, and I'm feeling chatty, so I'll pass on what I have been told/experienced/believe as a result of banging gear for 20 years:
If you have a used fit that is blocked because of congealed blood, use COLD water to unblock it.
When I was first told this, I was doubtful. I changed my mind when I found a tray that had been used to defrost meat left in the back yard after a BBQ. Had dried blood all over it. Ran hot water over part of it, and it moved very little of what was left on the tray. Ran cold water over the other part of it, and it loosened it much more quickly. Try it.
Apparently really hot water acts to further clot the blood. Bakes it on. Cold water acts more like an anti-coagulant. So, what I did for years was:
1) If I thought I might re-use a fit (not advisable, obviously) I would rinse it with cold water immediately after use, then do the whole water/bleach rinse immediately before using it again.
2) If I had a blocked fit (when trying to draw up a shot) I would try to loosen it first using cold water, then do as above. If cold water didn't work, I would toss the damn thing. Never found that hot water did the trick if residual blood was what was blocking it up.
3) If your fit was fine before you tried to have your shot, but is blocking when you jack it back, I got nothing helpful... Other than drink the dose instead...
4) A clean fit is always your best option. Obviously.
Just my 2cents worth.
PS - just googled "cold water rinse needles" and it seems the info above is still same as put out by harm-minimisation and IVDU organisations.