Warming up vials with hot water help with injection pinning smoothness?

Halfway through my cycle at I have noticed pinning takes way longer than usual.  I suspect it could be because of winter.  In summer time pinning 2ml would take 4 min or less time.  Now it takes about 10 min just for me to inject all the liquid into the muscle. I use 21g to draw and 26g to inject.  Would warming up vials help with it to make it faster and not effect quality of gear? 

Yes it can help a lot.
You don't want it to get too hot of course.

Warm it in a some warm water, don't cover the rubber stopper, try keep it untouched for sterile reasons.

Wipe with alcohol swap after, draw and inject.

Thanks man appreciate it.

Or you could just change to a 23guage 1 inch pin or a 1 inch 25g pin.