A few things worth considering...
Lizards (& snakes) either are 'brumating,' or they are not, there are no halfway measures. The physiological changes which induce brumation are significant, and it is likely you caused the death of the animal by continually disturbing it, and pumping it with food & water when it couldn't deal with the input. I'm sorry to be blunt about this, but it truly concerns me when inexperienced keepers feel they must interfere with natural processes, which, after all are simply a reflection of the animal's natural heritage and adaptation to the climate & habitat in which they live.
Bearded Dragons are compliant lizards, which is why they are popular as pets. They do, however, only 'tolerate' human interference - they don't seek to become 'part of the family', although they might seem to take pleasure in human company. Even though bred for generations in captivity, they are definitely not domestic animals, and you do them a disservice by suggesting otherwise.
The fact that your lizard consistently sought to brumate should have told you that it needed to be left alone, probably for months, until the days get longer and the weather warms up. It simply does not need food and water during that time, although you could probably make water available should it waken occasionally. If it was active, hungry and thirsty, it would have been out and about constantly.
There seems to be a great tendency for inexperienced keepers to overmanage their reptiles (which have been doing fine without human interference for millions of years) and to worry about the slightest change in behaviour.
These animals are largely seasonal in their behaviour, and for very good reason. They are not dogs, cats, or birds which have to maintain significant food & water intake remain active year round. The scented candles will have nothing to do with the death of your lizard.
Jamie