powdery mildew!!!!!!

i grow in tents and i guess i had to much heat so i fixed my exaust and im still having some problems with the mildew coming back a little. i spray with baking soda mixed with water is there anything else i can do? thanks

1/2 part organic milk to 4 parts water, or a sulphur burner

Get some Greencure. Do a foliar mix with a wetting agent or 1 drop of dishsoap if you don't have any.
If you can, add some silica supplementation like pro-tekt. This will increase ph and Si provides a physical barrier to spore germination.
You mentioned a heat issue, do you have proper ventilation?