Let it dry well, you may find that it will even out. If not, the moisturizer may be trapping the moisture. I would use cleaner on the bottom to remove any residue of treatment products, then let it dry and I can't say it enough...APPLE GUARD. It repels water.
I live in Florida. Eventually no matter what, my Balenciaga are going to get rain on them. Even if it's just drips from overhangs, car doors or whatever, I have never had water spot any of my bags. I've had it spot the leather on LV's if it's a drip from a roof and the water is dirty, but never Balenciaga.