Same. I suck on it for about 20 seconds, and it wipes off, Oxy or Opana, regardless. The coating isn't anything but an annoying nasty thing to snort though....
That's what I do, for only 9.7 seconds, though. Then 5.6 seconds to crush it up and 6.2 to line it up. Then 1.4 to sniff it. I get high in under 30 seconds.