I got a Desert Spring inline humidifier. Works quite well. I only set it to like 15-20 in this weather though otherwise the windows freeze up. It somewhat helps with my psoriasis. I actually noticed a difference in past few days as I set it a tad higher.
My house is super inefficient. Mostly the main floor. When they built it, they never used tape on the vapour barrier. One of these days I need to remove all the drywall and redo the vappour barrier. Big messy job though, but at least they used nails so it does make it easier to remove. I got a new patio door a few years back so ended up doing that section. Some places were missing insulation completely.