I have three eggs that pipped last night. one made an little x in it the other broke a small hole and the third broke a chunk of and it tweeting already and loudley. they pipped about 7pm last night the 3rd one pipped about 830 and still working its way out the others havent made any progress and i dont see the eggs moving. How long does it take to finish pipping? and at what point should i help? Also my themoter is ontop the eggs like the intrustions that came with it said to do will this cause any problems?