I make em with the same thing. The cool side is sitting at 67% humidity now sure about the warm side. Will check that soon. My acu rite and flukers has about a 10% diff on humidity.
I got a fan but cant exactly keep it running on the tub 24/7
Flukers says 63-67 the acu rite says 73-77
I haven opened up alot of holes it has brought it down a bit