As far as supplies go, I use 2 alcohol pads to clean the site of my son. I then apply "I.V Prep" to the surface...it's a cleanser but also sticky so that it makes the surface more adhesive. I then apply the sensor and set it up. After it's set up, I put a piece of Tegaderm film over top of the CGM...but you have to cut a hole in the film so that the actual sensor isn't covered...the film should just fit snuggly around the sensor.
Using this method, I can keep the sensor attached to his skin for 2 weeks. Today makes 2 weeks, 3 days he's worn his sensor and we'll be changing it out (by choice) this weekend. During the 2 weeks, if I need to "trim some loose film" I do that when he's asleep. If one side is becoming unstuck, I just cut away the part that's becoming unstuck and apply a new piece (trimmed to w/e size I want) over that part to apply new film.
It's worked well for us.
I will be moving; however, to skin tac after my I.V Prep is extinguished. To remove the sensor, use uni-solve or some similar chemical to allow the sticky tape to come off easily. I don't recommend the Uni-solve wipes...get the bottle with the roller on the bottom of the lid. I hear it works much better. I have to use 4 wipes each time I want to remove any of this tape.
Hope this helps some.