I just dried my 2nd run, two plants, in the same 3x3 they flowered in. I'm in a house, upstairs bedroom. Ambient house temp is 18 - 20°C. RH is low, around 10-15 here.
In the tent, RH was between 45 and 65, mostly 50, and Temps between 18 and 23 °C. I only checked in 2 or 3 times a day.
I didn't use a smart controller, just a timer on a humidifier, running for 1 hour on lowest setting, then off for 4. I also ran a AC Infinity T4 Inline fan @ 60% 24/7.
I have 1 main stem left to trim and jar, but the dry was perfect, so just keep it in this range and you'll be fine. Also you don't have to trim it all at once. I started trimming at 7 days. It's a bit of work.
Also, I saw someone "bucket rinse" each stem after cutting to clean off dust and bugs or whatever else, so I did that too this time. I think it was
@bk78
I actually soaked them for a couple minutes. Water was yellow and lots of dead plant matter removed. I think this helped with the dry as well. Definitely recommend!