Too much humidity?

Never thought I'd be asking THIS (search my earlier posts about my humidity battles early on!), but is there a top end for humidity?

Milton just went out of blue today, and I've had the humidity over 70% ever since he went into the blue phase. I came home today and it was at 85%... is that a problem? I immediately lowered it into the mid-70s just in case, but I wondered if that could be harmful.

I'm pulling for him to have a nice shed this time!!!

High humidity for a short period of time won't hurt anything. It would be constant, extended periods of time (like weeks and weeks on end) of high humidity that might cause health issues. A spike now and then won't bother him.

Thanks as always!