You can smoke the remains, but there isn't much THC left. What's left is cannaboids, the other chemicals in marijuana, and those give you a buzz. I smoke them when I'm desperate for a buzz that lasts anywhere from 30 minutes to 2 hours, depends how cashed the "ash" is, and how much you smoke of it.

Be warned, it's pretty unpleasant to smoke.
thedazn Reviewed by thedazn on . Questions about the Volcano Vaporizer Hey there users. I got a few questions about the Volcano Vaporizer. 1. After you heat up the cannabis you'll obviously know that it turns into burnt up roach. Can you re-smoke that roach again in the vaporizer as a second section or roll it up in the joint? Or is all the THC gone from the first session? Rating: 5