Our genius stone is starting to show some wear. Honestly I haven't cleaned it ONCE (the stone) since we've had it and we've run countless grams of all types of concentrate through this, including home extractions (which can tend to be a bit thicker, less pure than some of the refinements the store bought stuff has.) The butane lighter does a great job at cleaning up the stone (it was suggested to me to use ISO on the stone, just seems like a waste,) but I admit, sometimes after a good session, I'll pop up the plates and "dab" the stone against the dimbles to pull up the oil slick that escaped (hey, it's good shit, still RIPS!)
But I know that's abrading on the stone.
Fair warning, we loaded up the stone with distillate the other day and while my buddy was piling it on, he bumped it and OUT it went, right onto the floor, full of dog hair. So the stone definitely loses a little structure over time, it wasn't snug at first but it filled the hole, now it's not quite so much. And I need to sweep my kitchen floor more often, clearly!
Still lovin' it though, it's so convenient. Controlled dab hits.