Does it make sense to run an antifreeze mix through it after rinsing?
You know,..when I first read this answer I thought,.what the heck would you do that for? BUT after rethinking it,..If I were to have a sticking issue again,..I think I might try what you're saying. I bet a little shot of the cheap red anti-freeze through the injector at the end of the job may coat it just enough to stop the sticking. In fact, I may get in the habit anyhow,..not really that hard,..one quick pull of the trigger.