Humidfier recommendations?

I’m reaching that dry point in the year where humidity is hovering around 20-30%. I’ve been using a combo of a ultrasonic humidifier and a vicks warm mist unit to keep the levels stable in my reptile room. It feels like I’m refilling the water several times a day. I tried a Homedic ultrasonic warm mist unit but it didn’t bring the humidity up as much as the vicks one. Does anyone have some recommendations for units that are more efficient?