I found out that these patches are not for the new available sensors. They are really for the old original sensor that was used in clinical studies.
I sweat a lot and have been using them by cutting them in half and putting them under the transmitter to hold it down and they help but the are not for the current transmitter.
Here is the current transmitter (it is much smaller and attaches directly to the sensor). click here
I definitely would not have worn the old transmitter!! Looks to be aggravating, lol
That's the way for technology.... remember the first cellular phones in the eighties....see them on TV now and again on an old show or movie and they look like military walkie talkies. Who would buy one now? I guess you could try and sell it, just call it iBrick...... haha