Rathead123:

I disconnected mine as an extra precaution. The switch on mine is not very clear whether it is ON or OFF. When I first received my tank and turned the power on, it immediately started to smoke. When I thought I turned it OFF, it still spoked. The instruction book is of no value for anything because it was barely in comprehensible English. It was just simpler to just unplug it verses removing the unit all together.

When I received my second tank, before installing the battery, I disconnected the smoke unit. I did not care if it worked or not. I just wanted to make sure that I did not get tempted to try it.