What is the remedy for one who wanders greatly in prayer?

Question:
I am suffering from the problem of distraction in prayer and a lack of humility, even though I strive to keep my heart present in prayer, but to no avail. So what is the solution? Please advise us, may Allah reward you with good.

Answer:
The solution is as the Prophet (peace and blessings be upon him) taught Uthman ibn Abi al-As when he complained to him that Satan had confused his prayer: The Prophet (peace and blessings be upon him) ordered him to seek refuge with Allah three times, spit to his left three times, and say: "I seek refuge in Allah from the accursed Satan." If the whispers become frequent for him in prayer, he should spit to his left three times and say: "I seek refuge in Allah from the accursed Satan."
And he should strive to turn to Allah, to bring his heart before Allah, and to exert himself in this. This is an enemy who must be fought with the strength that the Messenger (peace and blessings be upon him) specified.
So the believer is like this: he seeks refuge in Allah from Satan, and strives to bring his heart, looking at what he was commanded to do, and that he is before Allah, and that he is standing before Him: reciting His Book, bowing, and prostrating; in exaltation of Him (Glorified and Exalted is He), until the enemy of Allah moves away from him: [An-Nas:4] The whisperer: at the time of heedlessness, the retreater: at the time of remembrance.
So whoever finds these whispers should seek help from Allah, increase in His remembrance, seek refuge in Allah from the accursed Satan, and have strength in fighting the enemy of Allah.