Not a huge problem obviously, which is why I'm alright with doing it myself. It seems like the spring has just come out of its socket. Album here
Basically, it doesn't spring back up and if you'll notice in the second photo there's a small bit of chrome protruding from the bottom that isn't seen on the handles that still work properly.
Is there a way to safely pop the cap off the base so that I can put the spring back into place?
There is no real way to fix these kinds of springs once they are broke. Replacement is probably your best course of action.
I think the easiest/cheapest way to go about it is to just replace the handle with one from a junk yard (pick-a-part, what have ya). The piece above the split should be a cap. From looking at it, it should fold up, so separates at the split. Use a small, thin screwdriver to pry up on it at the split (a thin knife might work well, too). Once the cap is moved up, you'll find a large screw underneath of it. Unscrew it from both ends and it will come off readily.
