Best way....

Consider yourself lucky. Most people are trying to keep their sticks from drying out right now. But you do have a problem nonetheless.

First of all, do you have a salt tested ditital hygrometer in there? Analogs are notorious for being inaccurate whether salt tested or not.

If you do, you can leave the lid open for an hour or two to evacuate excess humidity. After each opening close the lid for awhile and then see how that helps. Once you get it low enough the best recommendation I can give is to either get some beads or Boveda packs. Both of which are available at http://www.heartfeltindustries.com. Boveda packs actually come in a 68% pack I believe.

If you really want to pretect your investment you can get a Cigar Oasis. Its an active humidifier that will come on and boost the humidity if it gets below your setpoint. I have one and couldn't live without it.

To lower the RH you can add some pieces of spanish cedar, maybe from cigar boxes, coffins, etc. that you have. It will help absorb some of the excess moisture.

Yes extra pieces of cedar and open the lid from time to time. A dry sponge works okay but you need to keep rotating in fresh ones.

Does your humidor have two humidifiers? If so, take one out. My humi kept going up to about 80, I would let it air out, shut it and the next morning it was up to 80 again.
I took out one of the humidifying units and it's been holding steady at 70

Go with the heartfet beads. it will sove that problem. I had the same thing in my 50ct and Its been great since the beads were put in

beads are the only way to go. Once you try them you will be hooked. I use dried out beads in the summer, and wet beads in the winter. It gets so humid here the dried out beads suck it up.

I've never used the beads myself, but they sound like chemically tweaked silicone packs. I would be willing to bet money that if you put in a decent quantity of dry ones, they'll suck up a lot of moisture. I also bet you can dry them out the same way you do silicone packs for gun safes- put them in the oven @ ~250 degrees for a few hours. When they come out, they'll be ready to suck up tons more moisture. This oven bit may be overkill- the beads may soak up too much when they're that dry. Try just using beads that are at room RH, then if you need more drying, use the oven trick.

This all may be moot if the idea about removing one humidifier works. Try the simplest solutions first!

I've tried opening the humi to air out. It works, but seems like a poor long term solution to me. That really exposes your cigars to severe ups and downs.

It sounds like you just have a humidity source that is over exuberant. Are you using Propylene Glycol? This chemically limits how much moisture your humidifier will give off.

Good luck!

I haven't tried the oven trick, but to dry out my beads I put them in the fridge for a day. A normal fridge (not a wine fridge) sucks the moisture out of the air and will dry them out.

Opening the lid is certainly not a long term solution but will lower the humidity in the air in the humidor. As far as it being detrimental to the cigars, this is what you do whenever you take a cigar out for the day, isn't it? Leaving them in an overly humidified environment on the otherhand can cause mold, which will permanently ruin cigars. Even dried out cigars can be resurrected.