The Xiaomi Water Flosser 2 can only be filled with warm water below 40 °C or running tap water.
For your reference, here are some details about the types of liquids that can be put in the Xiaomi Water Flosser 2:
1. Do not add chemicals such as toothpaste, salt, mouthwash, or other solid mouthwash tablets. Otherwise, it will be clogged or damaged.
2. To ensure the lifespan and optimal functionality of the Xiaomi Water Flosser 2, always use clean water without any additives. This may not only affect the flow of water but also compromise the hygiene effectiveness of the device.
3. For best results, stick to the manufacturer's guidelines and use only water that is within the specified temperature range. This will help maintain the device's performance and ensure your safety during use.