What would help reduce condensation on my windows?
Honestly, if the problem is temperature related, you probably need new windows. Condensation is from drafty old windows or the weather stripping on the windows are shot. Windows can be “repaired”, but the price of windows have come down and the technological advances have increased the affordability of low e & agron windows. The Anderson Craftsman series in white vinyl are cheap and work really well (I have them in my house and installed countless others in other homes). The “expensive” nature of getting new windows is having them installed. I’m not sure where you live, but check locally with some smaller licensed remodelers. Check around and get multiple window bids. Don’t take the first deal to come along. If the problem is directly because of your gas fireplace, your cheapest more permanent solution is to install an exhaust fan (like the ones used for bathrooms) that will pull the moisture out of the air and vent it outside. Or just get dehumidifiers in each room and empty them once