I just made my second batch of co2. It is not producing any co2 into my diffuser and my tank. But when I shake the bottle, a little bit came out and in to the tank. I checked for leaks already, none was found. I did 2 cups of sugar, 1/2 tsp of yeast and a dash of old baking soda. I mixed the sugar and baking soda with warm water and activated my yeast with some warm water and sugar. then i dump the mixture together and sake and then hook it up to my tubbing.Does the temperature effect the rate of fermentation of the yeast? or what am i doing wrong?