like everyone else has said 50% is A-OK.
When shed time comes you can take a small pc of sponge and put it in the warm hide to boost up or do the humid hide thing.
Along with a daily soak of at least 45-60 mins and you should be more than fine.
You can also get a humidifier for the cage it's self. It's called a TropicAire or we even have a do it yourself one listed on here some where, that you can make.