Heard a funny sound around midnight last night....the fan in my styrofoam incubator had fallen down on my eggs!!! I grabbed a heating pad & covered the eggs while I worked quickly to repair. Used fine jewelry wire to attach the fan unit back to the top ...it was originally attached with double-sided sticky tape (from the manufacturer). Then I checked the eggs....only one had a hairline crack about 2 inches long & a dent...membrane was intact. Grabbed a candle & melted some wax to cover the crack & dent. I had just candled that evening....7th day...all had veining & little swimmers! I hope they'll be ok!