Just put together this power cord. Everything was going swimmingly, but after heating the shrink with my heat gun, the shrink did not stay in position and peeled back from both connectors leaving a goopy adhesive mess on both ends. I wasn't aware there was an adhesive on the interior. Any suggestions for a fix? Given that there is an adhesive I imagine that if I wanted to replace it the techflex is done for...what a headache.