So first sensor peeled off after 3 days and a shower.... Couldn't manage without it - how inconvenient to test BS at 3 am without it! Have ordered more but also let Abbott know and they have sent free of charge replacement. Their postage may be slow but their customer service is excellent.
Before you apply the next sensor,
Edit: got that the wrong way round :
shave the back of your arm first, then shower, alcohol wipe.
Even if a person doesn't have particularly hairy arms, most people do have a fine bristle of hair which is often difficult to see unless you take a really close look, and it will grow under the sensor. It can have a surprisingly large impact on stickiness, so best to shave it off.
I read a book called Wiley - In Vivo Glucose Sensing. It said that figuring out the right glue to use to make a sensor stick for X days without causing allergic reactions was a surprisingly difficult, non-trivial problem.
Can't recall if it was that book or some other place, but I certainly recall reading some technical piece which said that unshaven hair compromises stickiness a lot, so it's not just me saying that.
Abbot had problems in the early days with this. Looks like they've not entirely solved it yet.
All of mine have been fine. Apart from the shaving the arm business, when I shower, I make a point of washing the sensor arm last, keeping it generally out of the stream, and just washing around it.
Peeling off is probably as much to do with snagging on clothes, doorjambs, rucksacks as it is showers, so I do pay attention if I'm putting a rucksack etc. on. No point in tempting fate at 50 quid a shot.
A 7 by 8 cm plaster is pretty good for smoothing out the catchy bits.
Maybe this shaving business could be a good new line for barbers: dry cut £10, wet cut £20, libre attachment prep £7!