Hiding the Countryman EMW with MoleSkin

I got an email from someone stating that they were not having any luck hiding the EMW on a cotton T-Shirt. So I asked what type of Mole Skin was being used. The response was I dunno. You must use the Dr Scholls’ Moleskin the store brand or the type sold by the sound retailers. It does not stick as well or work as well. Also the moleskin is one time use only. Trying to reuse it will make it fail hope this helps