Ahh see that image, that's your pre flower. Those little white hairs are the pistils, that's already in the flowering stage.
Yeah, 88 is a little high but it's no big deal, be careful to keep your temps under control later on in flower. It'll damage the top colas, bleach them & damage the glands that produce that heavenly aroma.
Haha thanks for the compliment, but it's not my first redo. Ha
I'd keep the humidity pretty high in the veg stage, it promotes pretty fast growth. But in flower, humidity can cause mold/bud rot in most strains.
Try introducing a fan, it'll help disperse any major heat. Plus it builds a stronger plant, I find the stems be much stronger as they can sometimes bent under the weight of the buds.
Are you using a exhaust & carbon filter?