69Ron,
you make it sound like a touch of DMT N-Oxide is a bad thing!
However, I've not really noticed any difference between fresh spice and stuff that has been sitting around for a week uncovered.
This leads me to believe that either so little oxide is formed in a weeks time that it doesn't taint the experience or the DMT N-Oxide's effects are pretty darn close to that of DMT.
Stuff that has been sitting uncovered for 6 months is another story all together.