Just a heads up for any new libre users that some have problems with sensor adhesive not sticking properly. Personally I've always found the opposite and struggle to remove the sensors after two weeks! Just in case, I was told part of the reason to use the alcohol wipes or soap and water is to remove any moisturiser/creams etc from the surface of the skin so the adhesive sticks better. Some of the alcohol gels have moisturiser type substances mixed in them, so it might affect how long the sensor stays stuck.