I bought this cooker for fishing. With a gasoline stove I'd never do and am very surprised. I had operated it with mineral spirits from the hardware store. The flame is blue like a good cooker and almost no soot. Stink does the part well. You should release the manual watch then is actually all right. It worked right away. After less warming up he went the entire cooking process without stuttering. After that I let him run for half an hour to test on. Also without problems. Very good for warm hands when it just like this night -7 ° C had ;-). Processing works with value and gives hope for a long life of the boiler. On the positive side in the description not illustrated transport box made of plastic. Simple, but very practical!