User blog:EmpyreanSmoke/Crowley killing demons?

In "Soul Survivor", Crowley snapped his fingers and turned a black eyed demon into dust. At first I thought that because he was in Hell, he simply dematerialized the demon temperarlily, and turned him back into his smoke form. However, in "The Things We Left Behind", a demon secretly crawled out of Hell, and escaped to Earth. As a punishment, Crowley locked her up in the same building/place he turned that demon to smoke/dust. When the demon was talking to Rowena, she said "I'm here because I'm not suppose to be here". Since she got in trouble because she wasnt suppose to be on Earth, and she is currently where she isn't suppose to be, that means that she is on Earth. Since the place she is locked up in is on Earth, that means that Crowley turned the demon to dust on earth. This shows that Crowley couldn't have dematerialized the demon (becuase they are on earth), he actually killed him. Crowley is only a crossroads demon, so how in Hell (no pun intended) is he strong enough to vaporize a demon?! Please leave Andy comments or theories below.