i never ever candle , theres no reason to i always wonder why people need to know , ive never had one explode my thoughts are playing around with the opening and closeing the lid every 7 days will only hert the egg , i think its more trouble than its worth but ,,,,, that being said , if your incubating marans eggs from good sellers the eggs are so round and dark you cant tell were the air pocket is so if u lay it down in the incubator for 6 days or so the air pocket becomes more pronounced and easy to see a week into the incubation in order to know pointy end down air sac up , so my thoughts are do your hatch a favor and bite your nails twiddleee your thumbs do sopmething to take up time doing something else , but dont candle because you can know for sure in 22 days ( i never count the first day )
PS i hope i didnt rub anyone the wrong way