I'm still a little tacky too, and I'll never be cured.

Was this, by any chance 5 min epoxy? Many years ago i used some 5 minute stuff that was old and it never cured. If it was 30 min or more, don't worry about it, it will eventually cure. A little heat will speed it up. If you can... set it on top of your furnace or someplace warm like that (providing you don't have some sort of Frankenfurnace that will set it on fire). Or hit it with a hair dryer or heat gun.