I draw my gear then run syringe under hot water in sink. I heat with only plastic part under water not needle part. I heat until a couple drops comes out of needle on its own from expansion from heat. Takes about 45 sec. I inject slowly often stopping if muscle tenses and leave pin inside but move until muscle relaxes again instead of pushing against tense muscle. I have alot of scar tissue like I am sure alot of us do. I move over from last time in same area. I only do glutes, outer thigh, delts, and meaty tissue under delt on top of triceps. With only mon and Thurs injections up to 2-1/2 cc I only do glutes.