Hello!
I think i understand the blistersteel formula. That it takes 7 days and that you need to have the furnace lit for as long as possible on highest setting, but also taking out the blistersteel as soon as it is done.
Usually i always get 100% success rate, because i am able to time it perfect when it is done and pick it out. But this time i had work, which meant it took me 10 hours after it was finished to pick it out. All dross =(
Seems abit harsh does it not? Consider people with other obligations in life. Maybe the devs would consider raising the time abit? Just a suggestion.