ive been making bottles up fresh for the last couple of weeks which so far has been fine apart from the night feeds. just wondered do u leave the kettle to cool for 30 mins ? i dont understand why , is it for safety reasons so you dont scald yourself and baby.? its geting hard having baby scream for 30 mins at 3 in the morning.i was thinking i could leave kettle for 15 mins and then just cool bottle in cold water straight away then feed.does anyone do this ?