I purchased an inexpensive cool mist humidifier a few weeks ago as it’s been getting dry from Noon to Late Afternoon (21% right now).
You would probably want a larger one to run all the time (I get a marine layer in most evenings).
Works fine with filtered tap water (clean and let it air dry every other day which only take a few minutes).
I've used evaporative pans/basins in the past, but they were not doing enough this Winter.
DeKay