Hallo alhubb,
What's the weather like where you are? I took part in a Libre trial and had *four* sensors fall off in a single afternoon. Two of these sensors had clung to my upper arms quite happily for 11 days, but once the temperature climbed to 28C outside, and exceeded 30C in the house, the adhesive couldn't cope. The contact person for the trial told me that pretty much all her research subjects had reported sensors dropping off.
I hope you are able to capture some helpful data eventually! All best, HLC