To get the most out of your Honeywell humidifier, clean it regularly. This will help to eliminate bacteria and mineral build-up that can clog your machine or be released into the air. You should always use distilled water instead of tap water to keep the buildup of minerals in the tank to a minimum. If you do have mineral build-up, look up the differences between descaling and cleaning techniques.
Additionally, if using a warm mist humidifier, ensure that it is out of reach of children because the mist coming out of it is hot. With all humidifiers, it is best to keep them far from surfaces, such as shelves or ceilings, that can warp, stain or mildew due to repeated moisture exposure.
You can also increase the quality of the air in your home with other great Honeywell products, like a Honeywell air purifier. And, in warmer months of the year, you may actually benefit from using a dehumidifier in your home.