When innoculating, make sure you're doing things sterile (use a face mask or use a piece of clothing over your mouth etc.), sterilize your needle between innoculations, and make sure there's no moving air. Then insert your needle towards the side of the jar, squirt a little love in, turn the jar 1/4 turn and repeat until you've gone all the way around, then I like to inject some directly into the center additionally.

Good luck