Personally, I think your best shot is to strip all the leaves with PM to open up and really get airflow around your plants, then mix up 2% hydrogen peroxide and spray down the entire plant, a week later, mix up 1% and spray down the plant again. At least with this you don’t have to worry about getting spray on the budsites. The slightly more extreme option is to mix up potassium bicarbonate and water, kills PM instantly, but can be aggressive on the plant.
failing that, toss the entire grow, it’s not going to be worth keeping.
as for cleaning your tent, the thing I found works the best and easiest is a disinfectant fogger can. Turn your extractor off, set it off in the middle of your tent floor and zip it up. After 10min, put your extractor on. Then after that, just wipe the inside of your tent down with a cloth and some water.