The lower the humidity is, the slower your glue dries. If your environment is very dry, your glue dries very SLOW. If your humidity is very high, it will dry FAST. Secondly, the temperature also able to affect your glue. The hotter the temperature is, the thinner your glue viscosity becomes. Your glue tends to melt under a high heat. When they are melting, it becomes more liquid, and dries faster too. Therefore, the optimal temperature is 18-22 Celsius degree in a well-ventilated environment.