I don’t spend much time at home or in an office.
I don't know your situation but at the very least you can have a misting bottle that you use around you fairly often and/or also you can get one of those little plastic bottles in the pharmacy that contain a solution to squeeze into your nose as a mist and refill it often with water, keep it close and when you are in a private place such as a bathroom or car give your nose a quick mist. I know what those winter sinus infections can be like and I know a little extra moisture is all that is needed to avoid them.
Hey, not a bad idea for an invention would be a small humidifier that plugs into the car outlet as it is not pleasant or healthy getting dried out from forced hot air blowing at you in a car.