I have 34 eggs in my LG bator right now, I never thought of the foil idea, I think its a great idea, wonder what others think. This is only my 2nd time attempting to hatch. My 1st hatch, all eggs developed but I think I had the humidity to high the entire time because the chicks couldnt get out of their shells. Only 2 made it. This time I am letting it go dry every couple days then adding cold water. Hope it improves my odds!!! My eggs are due April 19th!! Good Luck ALL!!!!!