hey there Nerohero, you're halfway there with a humidifier, but the truth is it's not enough because it will only affect the humidity and not the temperature. Check out what's called an evaporative cooler , that should affect both the humidity and the temperature. if the temperature of the room the tent is in is above 25°C so the temperature in the tent will be high aswell. Try cooling the room by making shade, adding an A/C, etc. it's all about finding how to balance all these things to get it right. Hope this helps ! 🚀