I would like instructions for how long to steam the eggs if you donât get the water boiling first. That is if you just use tap water (ours is about 70F) and put the eggs in straight away. If I just put the eggs in the water in this fashion it takes exactly 10 minutes on high heat to get the perfect soft boiled egg. would like instructions for how long to steam the eggs if you donât get the water boiling first. That is if you just use tap water (ours is about 70F) and put the eggs in straight away. If I just put the eggs in the water in this fashion it takes exactly 10 minutes on high heat to get the perfect soft boiled egg.