I have breastfed for 15 weeks but want to try expressing. I have an Avent Steam Steriliser. It had 2 cycles, a 6 hr and a 24. I've just put the pump bits and some dummies in. If I lift the lid to get the dummies out does that mean the rest if it is then not sterile anymore? The instructions suggest I can pause it, get them out then carry on for the rest of the 24 hrs? Is that right?