I wanted to ask if for example, I had an dish that was contaminated because someone placed non halal meat on it, I washed it three times and I had gained certainty for a while that it had become Tahir. What does Sayed Zanjani say about purifying dishes that are contaminated by the Non Halal meat? Is his fatwa based on Wajib Ihtiyat? But later I got doubts whether I had washed that dish completely after gaining certainty before. What should I do in this case?