Unfortunately smoke units are a regular maintanence issue, just the way it is.
The more often you use it, and the higher the setting, the more often the need for rebuilding.
This is compunded by the fact that the newer legacy units have "jumbo" resisitors that can only be run a few minutes before additional fluid is needed.
IMO the "add ten drops" is a joke, the folks that mention adding an entire eyedropper at a time are probably correct.
I run mine on the lowest setting and get good smoke production. I also only use the smoke for short periods to extend the service life, but I know the units will eventually have to be rewicked. Its the "nature of the beast".
