What do you mean the stones die fast?
Do you know what kind of stones they are? Alum oxide (usually pink) will outlast polishing stones (usually green or blue). Dark brown stones are often harder than woodpecker lips. The colors aren't hard and fast rules though, and even hard stones will wear fast if you get them too hot or press too hard.
It's also good to have a dressing stone on hand so you can clean them if they load up and you can reshape the stones too for hard to reach spots.
But it looks like you're getting the hang!
