not sure if this works for button quail but coturnix I get much better hatch rates from if I set the eggs upright in their turners (which are on the floor of the incubator at this point not in the turning mechanism). You can also use quail egg trays, preferably plastic ones, with a hole cut in the bottom of each egg-hole to allow air and humidity to circulate. I'm pretty sure I got this tip from someone on here and it made all the difference to my hatch rate
WRT helping, something you can do is candle the egg and look for the airspace then use tweezers to open the eggshell *gingerly* at that part - just a little hole - and you can look in and see if it needs help or is dead. If you see blood vessels in the membrane, you can't do anything or you will cause a bleed. If the beak is through the membrane and the membrane is dry and leathery you can cautiously remove the dry leathery bits but if any bleeding starts, stop what you are doing immediately and return the chick to the incubator. I had one hatch of 50 coturnix where for some reason 10 chicks didn't hatch on their own and were all sitting in their eggs with their yolks retracted and ready to be let out when I opened the eggs. No idea what caused that. I was post-morteming the eggs 2 days after the first hatched when I nearly bashed a chick on the head opening an egg and realised I still had unhatched babies!