Greenhouse losing humidity I have one of the IKEA cabinets that I’m using as a greenhouse. I’ve had it for months and the humidity inside has always been about 90% without a humidifier nor any kind of sealant. A few weeks ago, I added some small fans to create more air circulation. I noticed a decrease in the humidity but figured it was because of the air flow. So then I turned the fans off and the humidity still did not increase. Is it possible that there is less humidity because the weather is getting colder outside? I’m in Chicago so we’re averaging about 40 degrees this time of year, but obviously the heat is on in my house. Now, I’ve started using a humidifier in the cabinet but it still hovers around only 60% and the inside gets way too wet. Does anyone know how I could fix this?