Hard to find info on, huh?
Check it out, I spoke with a very skilled and acclaimed grower regarding the use of the burner (the nuke) because I was sick of spraying.... long story short 2-3 tablespoons in the cup, set so the cup is just over/not touching the burner, 2-4hrs. LIGHTS OFF. Turn your fans & exhaust off, also.... if it s a light breakout the one time may fix it... if its a little bit more aggressive then a few times a week for a few weeks should slow/stop it.
^^^Thats's what I have been doing when I use the burner. Works great!^^^
I've run a sulpher burner thru week 4 of flower previously... no issues with taste or anything like that. I would know because i would hear about it (aka would have had to give some cheddar back or do some explaining to dance around it). BTW I have used NEEM up to 5 days before harvest and there were no residual effects (granted I did spray them off with water for 2 days before the chop...). I am sure you can burn sulpher (very lightly... like 2 tbs for 2hrs tops) up thru the last week and have nothing to worry about. At worst you hit the with a good splash of water a day or two before chop.
Hope this helps you