Not performing Wudu' properly and omitting some of its main parts

Q 2: While performing Wudu' (ablution), my mother does not perform Istinshaq (sniffing water into the nose and then expelling it) and Madmadah (rinsing the mouth), and does not wash her two hands up to the elbows or wipe her head properly. Are Istinshaq and Madmadah obligatory during performing Wudu'? What is the ruling on the way my mother performs Wudu'? It should be known that I have (Part No. 4; Page No. 83) tried to show her how to perform Wudu', but she is not convinced. Please advise and tell me whether her Salah (Prayer) is valid or not and substantiate your answer with sufficient proofs.

A: Performing Istinshaq and Madmadah, washing the hands up to the elbows, and wiping the whole head from the tip of the forehead until all the way back up to the neck are obligatory for Wudu' to be valid. None of these parts should be overlooked intentionally or forgetfully; otherwise, the Wudu' is nullified. You have to teach your mother how to perform Wudu' as prescribed by Shari`ah (Islamic law), advise her kindly, and explain the Hadiths mentioned in this regard. You should also urge her to make sincere Tawbah (repentance to Allah) for performing Wudu' incorrectly and not to do it this way again. May Allah pardon what she did previously due to her ignorance.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.