At what point is it TOO humid?

[Jessica Loesch]

i know theres too much if theres visible condensation in the terrarium or tank or tub or whatever you use as a cage...

i've had my humidity go so high it was reading as "HI" which is supposed to mean its over 90% but even then i've never had condensation because i ventilate the terrarium by leaving some of the top screen uncovered.

My acurite humidity thing says 49-51% humidity, and there is condensation on the tub. I have it in the middle of the tank right now hanging a little and not touching the substrate. Maybe I have it in a bad spot. Thoughts?