I am using the Acapella and follow the suggestions to wash the mouthpiece and dry upside down, on the end where the the mouthpiece goes. But, most the time, when I look inside the acapella, I notice that it has little droplets and has not dried out. Anyone else have this happen? And how do you clean and / or dry it. I'm worried that stuff can begin to grow in there since it is a moist environment.