i had a stinker, oddly when i blew it out, it didn't smell any worse my other duds. anyway, i first washed it with a warm cloth to make sure the smell wasn't something on the outside. then checked it the next day to see if it was the culprit. also did a blind sniff test with my son and brother to make sure i had the right egg. lastly i moved it to a second incubator.
the "clinky" sound, i was under the impression that that was a good sound. so maybe the eggs you suspect are the good eggs and the other 3 are the stinkers. wow, none of my advice is helpful.