Hello! We are struggling here. We have a water leak in the blue and red lines under bathroom sink. I can feel dampness but the inside of the cabinet is not wet. However it’s wet on the floor between the sink and shower and those lines are wet. (Water traveling down line?) The water has leaked into living room under fireplace. We are trying to figure out if the whole line needs to go or even how to reach under the sink! Any thoughts or experiences?