Close the valve of the bucket. The computer board will think that the water is full and light up the blue light. Then look for two small holes on the lower right side of the computer board. Take a needle that can be put in, and put it straight in (remember it is the one on the left). There will be something blocking the needle. If you use a little force, you can press it (it feels like pressing a button). Press it and it will not If you press it, the light corresponding to the filter element will flash. You can see which level you want to reset. Press it again and it will flash to the next level! After selecting the corresponding filter element, insert the hairpin into the hole on the right and hold it still for 1-2 seconds. There will be a sound, and then you will see that the filter element has changed back to its normal color! Repeat in sequence to adjust the filter elements at all levels