Is there condensation on your lid? If not your hygrometer may be lying...
Interesting to think about how to bring down humidity... please tell us about YOUR ambient humidity level, I think I might have missed your location somehow.
Anyways... if I was that high, I would consider making like a rice bag intake air filter or something to that effect.
We use rechargeable moisture things (desiccants) in our cars... or our back seat and carpets grow mildew. If I was going to incubate again in that humid an area, I would consider seeing how they worked.
Although drier total incubation will help prevent this heavy of worry in the future, and you already have that planned.
A cockerel is a young rooster and when many of them grow up and mature (12+ weeks usually some as early as 8) at that same time they aggressively (more like competitively and clumsily) mate every female in sight... usually the most docile... and take turns holding her down and knocking each other off to take more turns. It isn't actually the same thing as rape but when you see it happen, can be quite um... angering.

If you at least have a separation plan, that will be good. But no shame in either eating them yourself or letting them feed someone else's family. And talk about a good lesson to know where our food comes from (on their level of course). Talking up front and early about what you will do with all the extra males can soften the blow. We knew all along that we wanted to eat ours... but it still took us a long time to be mentally ready to face the challenge. We have succeeded, even though we DID wonder if it would turn us vegetarian.

Fortunately it didn't... because I really like hatching and I knew I couldn't continue to do so without a plan in place. Yep... we eat our Silkie boys!

I did find someone who will process for me for $5 each, and still as humanely as I can. Though we did have to do them ourselves' first.. with LOTS of BYC support and information. But it's a skill I am sooo thankful to have so that if any of my birds get injured or the like, past the point of simple repair... then I can help them out without extra suffering on their part.
So to wrap it up... cockerel and pullet are the correct terms for chickens under 1 year old. Then they are referred to as hen and rooster. BUT... it's my understanding that rooster is not an accepted term at shows and they are called cocks, more accurately. My family still uses the term roo in casual conversation even though we know it is technically like slang.