Broody hen with fertile egg gone slightly cold HELP!!!!?

My broody hen has been sitting on some fertile eggs 3 out of 6 which have hatched, she has moved slightly away from the other eggs but they're still lightly warm, could I take them away and place them in my airing cupboard and hope the see if they too, will hatch or once they've gone cold'ish is it impossible for them to hatch ? HELPPP PLEASEEEEEEEEEE!!!!!!!!!!!!