Leave well enough alone and let things pan out. If you start fooling around with stuff you make things worse usually. If pH is above 5 you'll be OK. How do you know the clusters are bugs? You have a magnifier or scope? There are soaps you can get to wash leaves and stems, but depending how close to harvest you are you may want to just skip them and learn from your mistake. As far as my experience goes root bound plants can produce just won't be anywhere near what a healthy unbound one will.