Thank you to all of you who have commented . Very useful! Maybe I was just unlucky. I have since bought a small cool/lunch bag so will try that out on my next trip.
I have had a Medtronic 780g with Guardian 4 sensors since May this year. I travelled by car through Spain in the summer, took loads of spare sensors with me as I was away for two months. However, on reaching my destination then found that half the sensors didn’t work. Initially couldn’t work...