Quick One stealth grow

Started my first indoor grow, my strain being the Quick One by Royal Queen Seeds! Using Biobizz Light Mix as my medium and will be using Biobizz nutes as well. The seed germinated in 3 days. I had my light about 50-60cm above the pot for the first days, but decided to lower it a bit since the seedling was showing signs of stretching and was about to fall. I now have a bamboo stick supporting it. My tent is very small, 40x40x120 (cm), placed inside a closet. So far I have been very pleased with the tent, very stealthy. My only problem is that the temperature inside tends to rise a bit too high (around 30-31 celcius), due to the tent being inside a closet. I have an exhaust fan, but due to it being somewhat loud I won’t be using it before I need it for the smell. I have been trying to lower the temps by placing frozen bottles of water inside the tent, seems to work fine! Also, the air inside is very dry by default, but I sprinkle water in the waterproof floor of the tent. This keeps the humidity in the 40-50% range.