Athosanswered grow question 6 years ago Even if you have high humidity, that doesn't mean you have bud rot; remember that it is a type of fungus and if your plants have not come in contact with the spores, then there's no infection. My lights off period when on 12/12 usually have high humidity like yours, but haven't had bud rot so far.
There's quite a few things that you can do, prevention wise:
1- Increase air circulation. 2-Defoliate: prevent those bunch of leaves one on top of each other, besides with less foliage: less transpiration, so less humidity. 3- water less: humidity rises because plant transpire most of the water they drink, so if you restrict the water, the humidity will lower.