Q 2: It is recorded in Sahih
on the authority of
`Uthman ibn Abu Al-`As
(may Allah be pleased with him) that he came to the Prophet (peace be upon him) and said: “O Messenger! Satan comes between me, my Salah (Prayer), and my recitation of the Qur’an and confounds me.” The Messenger of Allah (peace be upon him) said: “That is a devil called Khanzab! If you sense him, seek refuge with Allah from him and spit dryly to your left three times.” He (‘Uthman) said, “So I did and Allah rid me of him.”
(Part No. 5; Page No. 321
The Hadith should be acted upon according to its apparent meaning, as it is reported.
Ibn Al-Qayyim (may Allah be merciful to him) commented on this Hadith in his book "Zad Al-Ma‘ad" vol. 3 p. 29 as follows: Among that - its benefits - is that when a person seeks refuge with Allah from the cursed Satan and spits dryly to his left, nothing of that will harm him. This will not interrupt his Salah, but this leads to its perfection and completion.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.