Blame the Green/LEED/Energy Efficiency movement. The bathroom at our work has lukewarm to mildly cold water coming out of the faucets. Every so often the drain will backup and the is when somebody had to get really hot water from the kitchen to pour down the drain to free it up. The green soap doesn't dissolve all the way because the water isn't hot enough.
At the property where I work, they got the building LEED-certified, or whatever, so they could put the little sticker on the door, telling everyone how Green! we are. One ingredient in this was installing .5 gal/min aerators on the bathroom sink faucets. We already had slow drains on a lot of the sinks, but things got worse. When we called in a Roto-rooter type service, they opined that the problem was lack of water flow in the drains - the aerators were not allowing enough water into the system to keep things flowing. So, we bought a bunch of planet-killing aerators, to go back to the old rate of gal/min.
Not to worry, though, we left the sticker on the door.
On the plus side, the "gentle-foaming" hand soap that we switched to is supposed to be less cloggy in the drains.
