We use UV light as the primary disinfectant, along with a filtration system that’s the finest of any room in the world - 100 times finer than a human hair! We also use a small amount of hydrogen peroxide to oxidise any bacteria, but it can’t harm humans. It’s the safest and healthiest way we can keep the rooms clean. We also add one spray of diluted chlorine to the ventilation system each day after we close in the evenings - but this doesn’t go into the water.