Take lines loose and pull connectors out and put new orings on and slide back in with some oil on them and make sure the holes are clean to the groove
Not that I'm disagreeing and I'm willing to do that, but I cleaned the inside and around them pretty good before the install. I oiled them up prior to installation and they slid in fine. Blew them out with air and could not see through the center (probably a one way type valve) but could see through the tiny hole to one side of the center hole. There is a hole in the outer side of the adapter, I take the hole on the outer side as what lets the fuel out if it leaks inside. The injector has a fitting with an O-ring which would seal off the small hole to one side of the inner hole.
The injectors are new. The adapter has been cleaned. I cleaned the lines but probably not was well as I could have, and I blew them out with air. I'll pull one of the adapters out Friday and take some pics