I use Jarrows now, it will last forever, like others have said, use a tiny amount. I used to take a small glass jar, like the kind that model or craft paint comes in and punch a hole in the lid. Then took a small cotton rag and made a wick and filled the jar with mineral spirits. It will smoke like crazy, easy and quicker to light, much quicker than a candle. In a pinch I have used lipstick. I read recently here where someone uses a dry erase marker, I am anxious to try that, it sounds great, especially for small parts.