I am pretty sure that the cold I’ve acquired is due to low humidity. I moved into my new house four weeks ago and have definitely noticed a difference. I loaded up on Alka-Seltzer cold meds for a day and that knocked the cold back, but now I’m working on increasing the humidity in my house.
I got a good-size humidifier a couple of weeks ago but that seems to be barely helping. I have essential oil diffusers that put off a little steam, and my aquarium’s water level goes down pretty quickly. I scattered a few bowls of water around the house, but what seems to be helping most is my slow cooker, full of water and set on low (with the lid off, obv). I left it like that when I went to bed last night, and when I got up this morning, the humidity was up to 32%.
According to various things I have read on the internet, indoor humidity should be around 45-55%. I doubt I will ever get it that high, but at least I don’t have to worry about it getting too humid, which has its own set of problems.
I have also read that house plants help increase indoor humidity, which is all the encouragement I need to get more plants!