I would add, that you should consider how much of a good example you are yourself, if you as a parent are on the phone constantly, your kids will probably pick that up and do the same.
In my experience it is simply necessary to prevent oxygen to get back into you jar, as oxygen is what is needed for mold to develop. In regards to pressure recommendations, I am not of much help, I like to use old preserving jars with a rubber band between jar and lid, that allowes pressure to get out without oxygen getting in.
Awesome! Can we have the same thing for accounts? Deleting my Amazon account was such a nuisance…