Dealing with dry winter air — humidifier recommendations?

Canadian winters are brutal on our birds. My lineolated parakeet has been sneezing more and their skin looks dry. What humidifier do you use? I need one that's bird-safe (no essential oils!) and effective for a medium-sized room. What humidity level do you target?

The Toronto Humane Society sometimes has birds available for adoption too. Worth checking if you're in the downtown area.

Oh my bird did this for about about 10 days and I tried everything. Honestly, time was the biggest factor. They just grew out of it.

What does their diet look like? Sometimes these things are diet-related.