wudu

The Masnoon Method Of Wudu

Hazrat Usman (radhiallahu anhu) once asked: "Should I not show you the manner in which Rasulullah (sallallahu alaihi wasallam) performed his wudhu?" Thereafter he performed wudhu in such a manner that he washed every limb thrice. [Sahih Muslim, ch. on wudhu, Hadith 23] 

Masah (passing wet fingers) Over The Nape.

Hazrat Abdullah Ibn Umar (radhiallahu anhu) narrates that Rasulullah (sallallahu alaihi wasallam) said: "Whoever performs wudu and makes masah over his nape, he will be saved from wearing a necklace (of fire) around his neck on the the day of judgement". The famous commentator of Sahih al-Bukhari, Allamah Ibn Hajar Asqalaani (R.A), writes in his book Talkheesul Habeer (vol. 1: p.92) that this narration is Sahih. Allamah Shawkani (R.A.) has also affirmed this in Naylul Awtaar (vol. 1, p.204). 

Performing Masah Over Ordinary Socks

(i.e. cotton, woolllen, polyester, etc.)

It is not permissible to make masah over ordinary socks (cotton, woollen, nylon, etc. — i.e. all socks other than leather socks) in wudhu. There is no authentic narration sanctioning this practice. In the commentary of Tirmidhi, Tuhfatul Ahwazee, the famous Ahle Hadith scholar Allamah Mubarakpuri, has written that this practice of making masah on woollen, cotton, nylon socks and socks made from similar materials is not established from any authentic Hadith (vol. 1, pg.333). Many other high ranking scholars of the ghair muqallid sect (those who do not prescribe to taqleed) have refuted this practice and declared it as impermissible. (see fatawa Nazeeriah; 1:423)

ISLAM