Ash my candler is a mag light flashlight and a toilet paper tube. i would like the experience of candling so I am going to attempt to do each one, at least that is what I think I am doing, lol. I say that cause it might change, like 10 more times, before tonight.
You can just stand there, at the bator, with it open and pull one at a time. No need to open and close. Keep a pencil, and mark an X on the good ones then at the end pull the bad ones...then next time you candle, mark an O for good ones and then at the end pull the bad ones. You'll find a good system after a while.