Ok, I'll start using the filter. I have sterile water as well.
I haven't really been talking to anybody about it - just googled it and read some threads on bluelight and reddit. But I guess I came across the wrong threads, with bad advice.
Actually the idea that I had to heat it probably came from my mum to begin with. She's trained as a nurse. And she claims that it kills some of the bacteria, so for that reason it's a good idea. And that made sense to me.
As far as I know the micron filter doesn't take away bacteria? But I guess that's not as big a risk as impurities being dissolved.
What I've done so far is heat it in a water bath, on the stove.
Ok, that's a good idea actually. Another half ml isn't too bad.
To optimally sterilise the solution you'd have to boil it for a few minutes. The time you spend heating the solution in a spoon is a few seconds so not enough time to kill most of the germs that might be in it.
You'd kill a few maybe and that's still better than nothing I guess.
It was correctly pointed out that heating a solution of street drugs can cause undesirable adulterants to also become soluble and end up in your finished solution.
Don't heat the solution if you have a readily soluble street drug.
In general many drug users tend to have unsafe practices and you can even get away with bad practices for a long time until that day that your luck runs out.
The more injections the more chances for something to go wrong.
An injection creates an entry in your skin for germs to get inside... Sterile procedures aim to minimise this risk. They don't 100% avoid it. You're basically counting on your immune system to fight the few germs that will always manage to get in, even if you are as sterile as you can.
If you're healthy your immune system won't have problems with an injection given optimally but if you're not then you can have problems and the risk increases exponentially if the injection is administered in an unsafe way. I'll point out that prolonged use of certain drugs does affect your immune system's health so it's something to consider.
People get infections all the time from procedures in hospitals given in a sterile environment etc. It's not possible to cancel the risk completely, especially with people who are already debilitated.
It's always best to be as sterile as possible. You should never be sloppy with this stuff as you only need to be unlucky once.
I know most here will know this stuff. It's always good to stress harm reduction stuff IMO anyway.