Q：Hello! Do the JiChuan Limescale Remover of red and blue are difference in the severity of the dirt?

A：Hello, the JiChuan Limescale Remover is mainly remove scale. The red is for clean glass scale and the blue is for clean stone scale. You can reference the video for clean glass scale, and the remove scale effect is very good! → https://www.youtube.com/watch?v=dbd-aHF1pXY