Water light can't be reset. I bought a Starbucks Saeco Sirena espresso maker a month. Now it has a

Question

I bought a Starbucks Saeco Sirena espresso maker a month. Now it has a problem that the blue water light does not go off even though there is water. The light is on steadily (not blinking). I just can't reset the light. I tried lifting the water tank, wiping the bottom plug, putting it back. I tried a few times, it still does not work. With the blue water light on, the machine simply does not work. Greatly appreciate your help!Kan