Learned this from some Vets and some handy experience, just a quick pointer.

Newbs might read that heating up your gear before injection is a good idea, makes the oil flow easier and the higher temperatures allows the crystals to dissolve in your body quicker, particularly when considering a short ester compound. However, do not do what I did:

I thought that heating up my vial by using a hot water bath (tea cup with water heated in microwave) was a good idea. Did that for two weeks, ended up with several minor infections, nothing bad. But the PIP really bad , and i was generally crippled. Got to the point where my entire leg was bright red for days, which scared me and hurt alot, so I did some asking around and learned the following:

The vials from UGL tend not to be crimped 100% effectively, that allows the hot water and steam to creep into the vial, and when it cools, any bacteria or radicals in the water settle in your gear, which you are injecting.

Solution was to use my girlfriends hair dryer. Any dry heat source will work, just don't heat gear with anything that allows steam!!! No more PIP or infections!!

Thanks goes out to Nitti!!