1. Introduction and Overview
The Vicks 3-in-1 SleepyTime Humidifier, Diffuser, and Night Light (Model VUL500) is designed to enhance your environment by providing cool mist humidification, essential oil diffusion, and a soothing night light. This device helps maintain optimal humidity levels, which can temporarily relieve dry air discomforts and support better breathing and sleep.

Image 1.1: The Vicks 3-in-1 SleepyTime Humidifier, Diffuser, and Night Light, showing its compact design and controls.
This manual provides detailed instructions for the safe and effective use of your humidifier. Please read all instructions carefully before operation.
2. Important Safety Information
READ AND SAVE THESE IMPORTANT SAFETY INSTRUCTIONS.
- Always place the humidifier on a firm, flat, waterproof surface at least 12 inches (30 cm) away from walls and 3 feet (0.9 m) from heat sources.
- Do not operate the humidifier without water in the tank.
- Do not add essential oils directly to the water tank unless specifically designed for it. This model allows essential oils to be added directly to the tank water. Refer to essential oil labeling for usage and dosage instructions.
- Unplug the humidifier before filling, cleaning, or moving it.
- Keep out of reach of children and pets.
- Do not block air vents or mist outlet.
- Do not use detergents, gasoline, glass cleaner, furniture polish, paint thinner, or other household solvents to clean any part of the humidifier.
3. Product Components
Familiarize yourself with the parts of your Vicks 3-in-1 SleepyTime Humidifier:
- Mist Outlet
- Water Tank
- Base Unit
- Control Dial (Mist Output & Night Light)
- VapoPad Slot
- Power Cord

Image 3.1: The VapoPad slot is located on the front of the humidifier, designed for Vicks VapoPads (sample pad included).
4. Setup Instructions
Follow these steps for initial setup:
- Placement: Place the humidifier on a firm, level, waterproof surface. Ensure it is away from walls, furniture, and electronics.
- Fill Water Tank:
- Remove the water tank from the base.
- Unscrew the tank cap and fill the tank with cool, clean tap water. Distilled water is recommended to minimize mineral buildup.
- If using essential oils, add a few drops directly to the water in the tank. Refer to essential oil instructions for appropriate amounts.
- Securely replace the tank cap and place the tank back onto the base.
- Insert VapoPad (Optional): Open the VapoPad slot on the front of the humidifier and insert one Vicks VapoPad. Close the slot securely.
- Connect Power: Plug the power cord into a 120V AC electrical outlet.

Image 4.1: Demonstrates the wide opening of the water tank for easy filling and cleaning.
5. Operating Instructions
To operate your Vicks 3-in-1 SleepyTime Humidifier:
- Power On/Mist Control: Turn the control dial clockwise to the desired mist output level. The power indicator light will illuminate.
- Night Light Function:
- Press the night light button to cycle through the available colors or to set it to a specific color.
- Press again to turn the night light off.
- Essential Oil Diffusion: If essential oils were added to the water tank, the aroma will diffuse with the mist. If using VapoPads, the soothing vapors will be released.
- Automatic Shut-off: The humidifier will automatically turn off when the water tank is empty.
- Power Off: Turn the control dial counter-clockwise until it clicks to the "OFF" position. Unplug the unit when not in use.

Image 5.1: The humidifier displaying its night light feature, which can cycle through 7 different colors.

Image 5.2: The humidifier demonstrating its essential oil diffuser capability, compatible with VapoPads.

Image 5.3: A close-up view of the cool mist output from the humidifier, illustrating its humidification function.
6. Maintenance and Cleaning
Regular cleaning is essential for optimal performance and to prevent mineral buildup and bacterial growth.
Daily Maintenance:
- Turn off and unplug the unit.
- Remove the water tank and empty any remaining water.
- Rinse the water tank and base with cool water.
- Wipe all surfaces dry.
Weekly Cleaning (Descaling):
- Turn off and unplug the unit.
- Remove the water tank and empty any remaining water.
- Clean the Water Tank: Fill the tank with 1 cup of undiluted white vinegar. Swish the vinegar around in the tank to coat all surfaces. Let it stand for 20 minutes. Empty the vinegar and rinse thoroughly with clean water.
- Clean the Base: Pour 1/2 cup of undiluted white vinegar into the base. Let it stand for 20 minutes. Gently wipe the base with a soft cloth or brush to remove mineral deposits. Empty the vinegar and rinse thoroughly with clean water. Do not submerge the base in water.
- Ensure all parts are completely dry before reassembling or storing.
Do not use abrasive cleaners or harsh chemicals.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No mist or low mist output. | No water in tank; unit not plugged in; mineral buildup; mist outlet blocked. | Refill tank; plug in unit; clean unit as per maintenance instructions; ensure mist outlet is clear. |
| Water leakage. | Tank cap not secured; tank not seated correctly; cracks in tank. | Tighten tank cap; reseat tank firmly on base; inspect tank for damage. |
| Unusual odor. | New unit odor; dirty water; mineral buildup. | Run for a few hours; empty and refill with fresh water; clean unit thoroughly. |
| Night light not working. | Unit not powered on; light button not pressed. | Ensure unit is on; press the night light button. |
8. Specifications
- Model Number: VUL500
- Product Dimensions: 8.15 x 8.6 x 8.23 inches
- Weight: 3.7 Pounds
- Power: 48 watts, 120 volts
- Operation Mode: Ultrasonic
- Water Tank Capacity: 0.6 Gallons (approximately 2.27 Liters)
- Run Time: Up to 24 hours
- Coverage Area: Up to 250 Square Feet
- Special Features: Adjustable Humidity Control, Aroma Diffuser, Night Light

Image 8.1: Visual representation of the Vicks 3-in-1 SleepyTime Humidifier's dimensions.
9. Warranty and Customer Support
For warranty information or customer support, please refer to the warranty card included with your product or visit the official Vicks website. Keep your purchase receipt as proof of purchase.
For further assistance, contact Vicks Customer Service.





