For the 1st month of my HGH only cycle I was using 3.33iu's of the generic blue tops. I now have gone up to 4ius. My question is that when I only have 2iu left in the vial can I pull that out and then pull 2iu more from the new vial using the same needle? I know it will dull but I am just curious with bacteria or something like that would mess it up, so I dont have to shoot twice on that day.

-Stats are 32 year old Male, 220Lbs Body fat around 16%
-Goal is to lose fat and lean out.
-I am already down 8lbs in the 1st month and strength has gone up big time. Shooting everyday
-5th cycle of aas so I am not exactly a beginner but this is my first HGH cycle and plan to run for atleast 6 months and reassess from there.
-Weights 5 days a week and cardio 5 days a week. Diet is strict

Thanks in advance