Let’s look at the clues,….Pete is correct, if you flooded the smoke unit, she won’t say a word. Sometimes when you dropper in the smoke fluid, it’ll create a bubble and lock air from moving,….so you think you might have flooded it, then it sat, then it smoked great for a couple hours, , then it quit again?….is that the correct sequence of events?…..have you added anymore smoke fluid since it quit smoking??..if not, put in about 5-6 drops, then blow down the stack with your mouth,…it don’t take much, just enough to clear the bubble,….I’d try that and report back,….
Pat