Powdery mildew problem!!!!

I have powdery mildew. I just noticed it last night and it was kind of bad. I used 2 bottles of fungicide. I'm buying a sulphur burner tomorrow and I don't know how to run it???

1. Does anybody know where to get the sulphur?

2. If I haven't put them into flowering can I get rid of this? they are all in soil and vegged out for a month and 1 week 2.

I know this is probably a common issue, but I just want some FRESH advice on the subject. Maybe there is some other techniques IDK? If anybody could help it would save me a heart attack.
Thanks!
FP

local greenhouse should have some sulphur type sprays or mixtures ,, I had massive problem with it outside and the sulphur misting solved it .. I`m sure will work inside too ,.. might set the plants back a week or so but will recoupe ok ...