These do not stick, but they do really suck.
Total waste of money.  I don't know if these were outdated or what, but they do not stick to the skin at all from the first use.  I'd return them if I hadn't already tried them with the unit to find that they are ineffective.  If you're considering purchase, I'd advise you to save your money and just pass this right on by.
Rating: 1 stars