Why does my device produce so few hydrogen bubbles? The amount of hydrogen bubbles produced depends on the water quality and the operating environment, but is normal and should not be a reason to worry. What should I do if my device arrives with water damage or looks used ? As the device must be kept in an aqueous environment for maintenance, a small amount of pure water remains at the factory. This is normal. How can I check the effectiveness of hydrogen water? Checking the effectiveness of the hydrogen water produced can be difficult as special testing equipment is required. However, the product itself is safe to use, and we recommend the general health benefits. How can I make sure my device is in optimal working condition? Make sure you use your device according to the instructions and clean it regularly. For best results, it is best to use distilled water.