Clicking sound means all is well. I'd leave him be for now and check with steth every 1-2 hours. If you are not using a fan, the temps are low, which generally slows the process. However, do not adjust temp at this point. If you are using a fan and your humidity is still 72 or lower, you may want to raise humidity level in room bator is in (so as not to expose bator to dry room air) and very quickly open bator to set a sponge soaked in HOT water in it. And turn the fan off, if you can.