The stretchy detergent should be great for blown-ins. The bubble should host at least 10 blown-in bubbles. Even if a person does not know the art of bubbles and does not know how to do blow-ins, then from the second or third attempt with this detergent he/she will ultimately blow-in one or three bubbles. Of course, you can become so skillful that you'll do blow-ins even using a poor detergent. I, for example, can blow into ordinary bubbles "Funny idea", but this is not proper detergent for work. Anyone can do blow-ins using good detergent.