Hi! My son has been using and loving Frigg natural rubber pacifier. The issue is, that they can sometimes expand:) His favourite dummy is the one that has expanded and unfortunately due to the heavy use it broke down.....How can I get a dummy to expand (natural rubber one). The normal size falls out of his mouth all the time and I have to hold it at night. I know heat can help and I boiled them and steamed etc. but that didn't help! Do you have any hacks?:)