Thank you! I didn't yet. Good idea but you gotta at least tell me a few days or hours ?!?
Results to come
We are on a well, whole house filters, h2o softener.
Wife uses iron out in the laundry.
We do not have granite, but I would think(grin), your use of bleach is harsher than iron out, but Im no chemist.
Anytime I've made a "paste of it", usually, it's dried back to a solid in about 1 hour (+/-).
Just add water, if needed, to remove OR just letter sit again(smile).