Using the cleaning tablets is easy – you only need the reusable SINI bottle and a tablet that fits in your pocket. 1) Fill the bottle with warm water. 2) Add a tablet and let it dissolve for 30 minutes. 3) Attach the nozzle and start cleaning! The water should be hot, around 55°C. When using hot water, the tablet dissolves faster. It takes approximately 30 minutes for the tablet to fully dissolve in water. When using cold water, the tablet dissolves more slowly, in approximately 60 minutes.