try getting under tub and taking of plumbing pipes and clean them. I did it to mine this weekend and I pulled out 4 tooth brashes (lady must off be buying those at costco in 50 bag). Now it hungry for a water to drain: MORE MORE MORE!
It really easy to take them off, just unscrew 2 rings (you probably can do it with your hands), be carefull upon taking off - h::barf:wned:- ITS FULL OF DIRTY WATER! KEEP YOUR MOUTH SHUT!!!