Hi David,
Just 3 suggestions you may find useful.
1.Keep the area that you will be applying the sensor shaved now and again.
2. Unfortunately the Libre2 sensors no longer come with an alchohol swab any more ( something to do with Brexit ), so try to purchase 500cc of 70% propyl-alchohol from your pharmacy or on-line. Make up your own swabs with cut segments of paper hand towels/ kitchen roll (a single sheet will be enough when cut into segments, to make up to 16 folded swabs).
You can then store them in a medium Ziplock bag, soaked in a small quantity of the propyl alchohol - just enough to wet them - 30 to 40cc should be enough.
The sealed bag will keep them sufficiently damp and sterile for a long period - top up with the propyl-alchohol should you ever inadvertently let them dry out!
A 500cc bottle of propyl-alchohol should last you for a few years.
3. You can now use these DIY propyl-alchohol moistened swabs, to clean all around the skin area where you are intending to stick your sensor, aiming to remove all skin oil.
N.B. Make sure you allow the skin to completely dry, by allowing the alchohol to fully evaporate, before you apply the new sensor, and press down all around the periphery of the sensor to ensure a good adhesion. You can also use the remaining swab to clean any remaining adhesive from the removal site of the previous sensor.
I have done this ever since the start of Covid, with no problems.
Good luck.