Had mildew. What would you do?

Heyo, first of all waaaaay too much light, waaaay too much. Get rid off the plants, cant help it. And yes cutting dead material always helps, its a breedingstation for mold and deseases. Dead plants wont protect themselves, but now its too late i guess. For next time tho

Sadly you didnt have mildew, you still have it. I can still see it in the lower parts of the plant. It does not just sit on the leaf surface, it penetrates through the whole plants tissue and is unstoppable. Spraying stuff on it might only make it worse due to the water content... You cannot sterilize the whole plant, so there sadly is nothing left to save here. Dont risk your health, it is not worth it. Cut it off and throw it away. I do not recommend to try to save or consume it.