Surprisingly cracking it open helped me. I have a Sunlu S2 and never thought it worked overly well, humidity would drop from around 60% ambient to 40’s after many hours. Two days ago I read about propping it open about an inch, and since then humidity has been in the mid-20’s to low 30’s. I’m waiting on a small blower fan to mod it with a fan instead of propping it open.
More importantly, what’s this about a 5th slot?