Packing jars too tightly?

[Searock Fan]

I pack it tight. Air is the enemy of freshness.

 

[midcentry]

I like the 8oz jars for the usual 50g tins. I usually pop it open, smoke a bowl, and cram the rest into the jar and it is usually packed pretty tight. I am also paranoid about mold, so i think the most important thing is that your jar and hands are clean