The blue tack (white tack) is a great idea. I’ll try that on the next one I make tonight. My contact mic is for the throat, around the vocal cord box and I might try one on my cheek- I noticed recently it vibrates too
Love the idea of using a piezo mic/sensor in clothing. The magic glove made me think of a glove with 5 small 1/2" piezo discs to be used as trigger/gate or even note/velocity input for a modular synth. And love the cats 💖 Do add some piezo discs in the cats scratching pole, that might get you some nice sounds to use