I am a pediatric OT and had a child I was working that had no awareness when saliva was pooling in her mouth or when her chin was wet. She follows verbal directions. I told her to swallow when she felt the tickle (vibration). I placed my IPhone in the hood of her jacket. It worked! This was the first time that she had a dry chin for 30 min. Prior to this she went through 3-4 wet bibs while in school. I am telling all of my OT friends about it. Best app that I have purchased related to my profession.