Oh I forgot to say I had two cracked eggs that I got from someone and I used wax , one didnt grow at all and was completly clear by day11 and one that is on day 13 and has a wiggly growing chick.
just make shure you dont take to long the longer you wait the bigger the chance bactiria can get in there and kill the chick.
If it was me and I would use the scented if I coudnt get uncented in the next 20-30 min but Im new at this allso
if its not leaking you can melt candle wax to cover the crack , uncented is best but if you dont have uncentted im shure its better then chucking the poor thing. What day are you on.? YOu can use little birthday candles..If you dont have a candle and cant get one you could try the sticky part of...