Dehumidifier refuses to pull past 57% (capable of 30%-80%)

Do you have an actual exhaust fan? Something that will help suck/draw out the hot & wet air? A hole is pretty passive. Intake at the bottom (low cool air in) and exhaust at top...

Oh man! Do I ever fell ya! You have to get a bigger dehu! Problem is the heat! Sorry to say! I run two—- one in the tent and during the lights on I open the tent and have another outside! It’s sucks growing in the summer ✌️🏻💚🌿💨

You need a stronger air intake on the floor. If you can keep your door open, put a fan on the floor blowing in. You need to push the humidity up and out.the more foliage you have in your tent the harder its going to be yo keep humidity down. Leaves exhaust moisture when the breath. Defoliation indoor is important if your growing larger or multiple plants. Never defoliate outdoor plants.

Nice grow by the way. You have a lot of growth in there which contributes to the RH going up. If your RH is 57% you don't have anything to worry about. As your plant progresses through flower you will find yourself removing leaves to expose more flowers to the light and that will bring your Rh down a bit.