high humidity

So I made a post a while back on my humidity being to high, got told to use cat liter or a dihumidifier Well I've used both an it's still in the 80s tent closed, 65% tent open... I'm two weeks into flower and basically ripping my hair out in case of bid rot, something I genuinely can not be...

Hey guys, Just about to start harvesting some WW bag seed from hermies. No great expectations from them, they hermied also but I caught it early (mostly). Nice lemon smell to them, and low temps have gotten a little purple going on in late flower. This is my first real grow so it'll be good...

Hey all I've seen multiple topics about this. Basically increase temperature to lower humidity. I have this issue when lights off it creeps to 50s to 60s RH. I have my exhaust off when lights off. I have a 220w tube heater on ground level. Temp when lights off is around 18degrees Celsius...