I have been using free style Libre for the past 17 months and have caught a couple on doors and one stopped working. Mine are free from the NHS in Scotland but only prescribed 26 over the year. Any that have been dislodged have been replaced by Libre free of charge. I go on holiday in the Summer for 3 weeks and am on holiday just now and within the first 3 days, 2 of them became unstuck. I always place them on the outer part of the arm and never had issues before but believe they have changed the adhesive recently. I put one on the day before we left for holiday and it lasted 2 days after we arrived whilst the 2nd one lasted 4 hours! Have then gone a week or more without one as only brought one spare which I have located on the underside of my arm and it has so far lasted 8 days.