I’ve been using Dexcom g6, but from what I can remember libre 2 has no seal of the type you desribe. I used to always have the applicator on a level surface (table) and twist both the top and the bottom in opposite directions. It does take some force… and i was, because i had it on a table, probably also pushing down on the top (but I can’t recall well enough to be sure sorry). The positive thing is that they’re hard to damage but that’s not much consolation if you can’t twist it openI just started using the sensor but I cannot get the applicator cap off. My dietician got the first one off and applied to my arm. does it have a seal like they do around some juice bottles where you can get a knife in there to break it? It kind of looks like it does but haven’t tried that yet. How they expect people with poor hand strength to get this open is a joke