I have a tommee tippee electric steam steriliser, it has a countdown timer and the instructions say if the contents have not been used within 3 hours they need to be sterilised again. why is this? my twins feed roughly every 3 hours so i only need two bottle/teats every 3 hours which means turning on the steriliser with all the same bottles in it every 3 hours, i dont understand how they dont stay sterile. Is this the same with every steriliser?
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