Ya, you only need like 3 drops to make the epoxy as thin as water. Thinning the epoxy make sit act different. It gets a greasy feel you are talking about and really slows down the hardening of the epoxy. You said it feels tacky, so it is setting up, just taking a lot longer probably because you thinned it down too much. I would give it few more days and see if its set by then. [8D]