cybrguy
Putin is a War Criminal
I originally did not expect them to need much cleaning because they are the heat source and you are generally not pulling vapor through them. However, I found that enough vapor rises into the ball chamber, especially when using the Tempest head on glass, that the balls do get dirty enough to need occasional cleaning. In my case, I clean them by taking them out and torching them about once every month or two depending on how much use they are getting.