and I have to admitt I don't understand how these things work. My old patch was "Mylan" and it was just a patch. This new one is bigger and has jelly stuff on the inside. That makes it seem more dangerous. How do these things work? How do they know how much an hour to put out especially for three days? What if it gets a hole in it? I have touble keeping it on. Is there any spot thats better--on a woman? What if there is jelly still in the patch when its time to take it off, does that mean it didn't work right? It never seems to last long enough and that third day I feel like crap. Anyway mainly how do they work hour by hour??? Thanks, Debb