Removing impurity from a carpet

Q: We have wall to wall carpets on each room's floor in our house. If it gets impure, how can one make it paak? It is not possible to pick it up and let water flow through it. I take a dry towel. Pour water over the impurity and rub it dry with the towel. I repeat it three times. Does it make the carpet pure?

Hadith Question: Grinding seven Ajwa dates with their pits

Q: Is the following Hadith Sharif sahih and suitable to quote?

Hadhrat Sa'd bin Abi Waqqaas (RA) reports that Rasulullaah (SAW) once came to visit him when he fell ill. Rasulullaah (SAW) placed his hand on Hadhrat Sa’d (RA)’s chest, because of which he felt a cool feeling spread through his chest. Rasulullaah (SAW) said, “His heart is palpitating. Take him to Haarith bin Kaldah, who is a very good physician. He needs to grind seven Ajwa dates with their pits and administer it.” [Abu Dawood 3875]

Burying hair

Q: Please tell me what Ii should do with my fallen hair which I have collected since 10 years. I am not throwing it out because I don't know where to throw it? If I throw it in the sea, won't it cause harm to the fish? Shall I bury it in a Muslim graveyard?

Alternative to early settlement discount

Q: Will it be permissible for one to make an agreement with the supplier, at the onset before purchasing, that for example, the terms will be 30 days with a discount of 5%? There are a few suppliers with whom we have an agreement such as the one described above and we keep to the arranged terms. However, the time period and discount differs from supplier to supplier. If this is not permissible, then what is the solution to rectify the situation?

Choosing a life partner

Q: During the passed month of Ramadhaan, I engaged myself in dua few minutes before iftaar time. I asked Allah for indication for a suitable spouse, immediately after terminating the dua, my parents mentioned a girl to me. Should I accept this as an answer? What would be a permissible means to initiate a marriage proposal. It is to be noted that I do not know who this girl is. I have met her father a couple of times before, but just in passing.