As long as you keep the faucet area dry, it works. ( Yeh this is for a water faucet). The moment the area around the faucet base gets some water or the area where the faucet turns gets wet, it stops working. The only way to make it work is to get a paper towel and dry the whole faucet area and wait. After about 2-3 minutes when the area dries it starts working.
Good concept, not a practical faucet.