Kitchen Sink: Even the toilet may be cleaner than the kitchen sink. Food particles from plates left to soak or rinsed from dishes on their way to the dishwasher can serve as a breeding ground for illness causing bacteria and even salmonella. Even if you try to clean, it will be very hard to clean and disinfect the area where the drain plug is and particular the ring. This two are the spots where you can’t reach. That’s why we use the professional steam cleaner to reach and disinfect them.
Bathtub: A recent study found http://www.science.tamu.edu/news/story.php?story_ID=493#.VuU1H5x96Uk staphylococcus bacteria 26% of the tubs tested. A separate study found even worse on whirlpool tubs. What they found was dangerous bacterial growth. Almost all showed bacteria from fecal matter; 81% had fungi, and 34% contained staph bacteria. Best way to disinfect is Steam cleaning.
Additionally, the high temperature steam is effective at killing germs and the high pressurized water can reach into even the smallest cracks and crevices where other cleaning tools often can’t reach. Plus it is eco friendly.