Ionic foot detox electrode scam. How it works.

I love quack products, and this is quite an intriguing one. It claims to use electrical current to draw all the impurities out of your body and down into a tub of water via your feet.
In use you sit with your feet in a tray of water with a disposable liner (for staining reasons), and a special detox electrode is placed in the water next to your feet. A wristband may be connected to your arm or possibly a pad to your neck, with the theory being that a small electrical current flows between there and your feet to help flush out your body toxins. In reality the pads or wristbands are either doing nothing or are acting as simple sensor to detect when you actually have your feet in the water.
You sit there for about 30 minutes while the water your feet are in gradually goes brown and yukky as all the toxins from within your body are pulled out.
But in reality the brown sludge is being generated by the controlled DC electrolysis of the electrodes reacting with the ordinary table salt in the water. The results are then analysed using a colour chart to determine exactly what was purged from your body.
After your expensive pampering you leave to go to the nearest coffee shop, feeling wonderful because your body has been cleansed of impurities. Job done.