The Ruling on Istinja' (Cleaning Oneself) at Every Prayer

He says in his letter as well: We are ignorant of what we must know, so how is the process of istinja' (cleaning oneself) carried out? May Allah guide you. Is a person required to wash his private parts every time, or not? We want to be informed, and for the listeners to be informed, about this. May Allah reward you with the best reward.
Answer: Istinja' (cleaning oneself) is obligatory only if urine or feces are present, or when the time for prayer arrives. A Muslim washes his private parts when he urinates; when he urinates, he washes his private parts from the urine, and he performs istinja' from the feces. This is sufficient for him at any time. So when the time for prayer comes, he performs the wudu' (ablution) for prayer, starting with rinsing the mouth and sniffing water into the nose, and that is sufficient. There is no need for istinja' if he has already washed his private parts from urine, or washed his anus from feces, or used stones or paper three times or more until he has purified the area. In that case, he is not required to repeat it when the time for Dhuhr (midday prayer) arrives, if he had performed istinja' in the morning (Dhuha) with water, washing his private parts and his anus, or used stones in the morning and purified the area three times or more. He does not repeat it for Dhuhr if no feces or urine have occurred, except for the first instance from which he purified himself; he does not repeat it. Rather, he performs the wiping, which some of the common people call "tamshih" (wiping), which is the Shari'ah-prescribed wudu'. That is, he starts by washing his hands three times, then rinses his mouth and sniffs water into his nose, and washes his face to the end of it. He does not repeat the istinja'. Even if he did not intend anything of that at that moment, if he washed it in the morning, for example, he does not repeat it. Similarly, if feces occur in the afternoon ('Asr), or if he urinates and washes his private parts from the urine, and performs istinja' from the feces and washes his anus until he has purified the area, and then the time for Maghrib (sunset prayer) arrives and no urine or feces have come to him since then, he performs the Shari'ah-prescribed wudu'. That is, he performs the wiping, starting with rinsing the mouth and sniffing water into the nose, and he does not repeat the istinja'. Likewise, if he sleeps, or if wind comes out of him, or if he eats camel meat, he does not perform istinja'; he only performs the wiping, starting with rinsing the mouth and sniffing water into the nose. This is because sleeping, eating camel meat, and touching the private parts do not require istinja'. Istinja' is specifically for urine and feces. As for these things that break the wudu', such as wind from the back passage and flatulence, such as touching the private parts, and such as eating camel meat, these do not obligate istinja'. However, he performs a Shari'ah-prescribed wudu', starting with rinsing the mouth and sniffing water into the nose, and he does not wash his anus or his private parts, except from urine or feces. Yes.