No, it's pretty much after the fact -- I can feel the build-up of wax, and can predict that when I finally use a Q-tip, it will be "productive".
And I hardly use IEM's, so I doubt it's that, either.
I'll try to monitor myself more closely, see if there's something else going on -- maybe when my allergies are exacerbated, my ears itch, and I itch them, or something like that. Or perhaps it's the dusty environment.