A couple of questions.... 1. The only way we can get the site to last for more than 3 or 4 days is to use Mastisol spray. We spray it on his skin, trying to avoid the place the wire will go in. Our Dex trainer told us not to use any adhesive, but this had worked well for us. Think it's okay? 2. Sensor failed last night at time if initial insertion. When we pulled it off, there no sigh of the wire on the sensor. It must be in his stomach. Now what? Thanks!