It ought to be still working some, but you do need to consider the atomizer a disposable component - I replace mine every 2 weeks or so, when the vapour starts dropping off to unacceptable levels. Those who vape less than I do may get longer out of them (and those who will tolerate diminishing vapour likewise,) and some folks resort to coke baths/peroxide/assorted patent remedy cleaning routines that they swear rejuvenates their atties. But I find it easier to just put in a new one
Alas, the everlasting atomizer has yet to be invented

So always keep a few spares. I'm guessing that's where the problem lies (though checking all the connections are clean is also important.)