seasoning - what about the drain plug??

Hey all,

I am seasoning my new pit...I know, I know - it's late! :-) But I got a good nap in, it's holding temps well, and I can sleep when I'm dead. Besides, plenty of beer here

Since I rubbed the inside real good w/ oil, after a while - should i open the drain on the bottom and let that run out...along with some of the impurities, I'm hoping? Or leave it shut??

Thanks!

Brian