I have never used AllKare but it is advertised as a barrier wipe. I use SkinTac which is advertised as an adhesive barrier wipe. If the words mean anything, I would expect SkinTac to have more adhesion power.
I apply SkinTac directly to the underside of the sensor tape and let it dry. I then attach it to my body and really press down the adhesive before inserting the sensor wire. This usually gets me 10-14 days of adhesion. Once the edges start to peel up, I then use Opstie Flexifix with a hole cut off for the transmitter or more recently, DexTape which is precut and much easier to apply to my arm sites. This carries me through for about 3+ weeks.