The release of fentanyl
is based on temp on the patch, This is the reason, and the sole reson why we must be careful with some areas of recreaton and the hot tubs.
Moreover, trust in your Doctor. seems ro me by reading your post, you are a, straight shooter and your doctor can see that. Most doc's WILL NOT JUMP FROM ER VICS, STRAIGHT TO FENTANYL. He sees a reason for the switch.
I have worn the patch 6 years, and it has never ever come off in the bath or pool!