If you are already hanging inside of your grow tent, consider using a humidity controller on an exhaust fan w/scrubber. You can set it to your desired level and the fan will only turn on when it goes above that point. Takes a lot out of guesswork and fiddling. This takes some know-how to wire, but does wonders. Good luck!
https://www.amazon.com/Electronic-Controller-Hygrometer-Hygrostat-Humidistat/dp/B019NP6SC6