Get yourself a Vicks warm mist humidifier. It works great and is enough to bump up the humidity in small rooms by a good 4-10%. We ran them overnight on our counters at our last house. I have one in the basement sitting on the bar counter to take care of basement, not just one room. Rooms are averaging about 41% when running. Seems to take the edge off.
https://www.vickshumidifiers.com/products/humidifiers/vicks-warm-mist-humidifier-1/