How to deal with white mold? Using folliar spray ...

Up air flow, water in the morning or lights on so it can be evaporating. Jms stylet oil, suffoil-x, plain old green cleaner(the plant stuff not the house cleaner) all 3 are also good at getting some bugs too i believe. The hydrogen peroxide mix definitely spray at lights out time if you use it. And then neem oil or neem cake is very helpful and safe also, it can benefit the soil as well. But definitely if you use any treatment, afterwards try to increase the airflow in your space so the spores cannot get comfortable and settle on your plant, and try keeping the humidity either under control or consistent because usually the variation from low rh to high rh at lights out is the problem...the variation. So keep the rise and fall to a minimum. Happy growing ✌️

You just described a foliar spray solution to fight against fungus or mildew. If you want to prevent mild you need to keep an eye on your RH and keep slowly decrease the level while your plant is flowering.