2 weeks is best in my opinion. Keep the water dish in there for that long as well, don't remove anything, a sponge will help, rotate the sponge in the water every couple days to make sure it's saturated.
Don't worry about the GF, mine hated it too at first.
A little tip for that, convince her to take a few puffs when your smoking, mine ended up liking a Perdomo Grand Cru and started experimenting, now she's already claiming my old humidor when I get my new wineador all set up.
