Don’t worry too much about water clarity - it will never be perfect. If the water becomes very dirty in a few days, it may be due to tap water used in Electrolyzer rather than distilled water!
Replace the distilled water once every 2-4 weeks. You may want to wash the entire unit, including the jar and electrodes, with tap water. No need to use soap or chemicals for perfect cleanliness. We’re not in a pharmacy, man, we’re under the hood of a car!
Remember to add Baking Soda to the water. Refilling instructions and recommendations here and here.