Your lugs, do you torque them?
They're probably coming loose because they are unevenly tightened.
Tighten them across not in a circle. This idea makes sense if you sit there and think and/or if you've tuned a drum set before or something.
And you want to torque them
80 pound's per lug
Over tightening and under tightening can cause lug failure
Torqueing them all to the factory 80 lbs should fix you're problem.