I recently purchased a 3 faucet cobra style Celli tower. It was super cheap so I didn't hesitate. Now that I've got it, I've noticed the faucets aren't working well. Two of three taps are completely seized shut, and the other moves, but not smoothly. Any idea how I can un-stick the seized ones and smooth out the stiff one? I know they're made of chrome plated brass, if that matters. Is there a cleaner I can use the soak them in?