Can products like Kalstop and/or Frescovapor be added to the water in the tank?

No, it is strongly recommended to use only tap water, without any additives or added substances. To ensure proper operation and preserve the device’s longevity, please avoid using: - distilled water, rainwater, or water enriched with additives (such as starch or fragrances) - water from other appliances, filtered pitchers, or water softeners - any type of chemical or natural substances, including detergents, descalers, essential oils, etc. Adding such elements may compromise the product’s performance and void the warranty.