There are some things which spoil a Muslim’s wudu. They are called the invalidators of wudu. if the wudu is invalid, a Muslim’s salah is invalid as well. Therefore, wudu must be made again. This applies to the obligatory and the voluntary prayers on equal footing. Wudu is also a condition for the validity of circumambulation (Tawaf) of al-kaaba. Moreover, wudu is a must when holding or reading the Holy Quran.
What makes wudu invalid:
Students learn how to make wudu in their courses of Islamic studies.
(1) When a Muslim makes wind, urine or stool, their wudu is invalid.
(2) Also the secretion of semen spoils a Muslim’s wudu. And there is a hadith from ‘Abdullah ibn Zayd and Abu Hurayrah (may Allah be pleased with them) concerning wind that the Messenger (peace and blessings of Allaah be upon him) said: He should not leave or do not leave the mosque until he hears a voice or find the wind.
(3) Deep sleep: or fainting, i.e. the state in which a person does not feel what is happening in his body and what comes out of it. In this case a Muslim’s wudu is invalid
(4) Eating camel meat: Whether it is raw or cooked and any part of the camel, whether it is a lot or a little, according to what Prophet Mohammad (peace and blessings of Allah be upon him) was asked in this regard and replied that it is obligatory to perform ablution after eating camel / camel meat.
(5) Everything that must be done to do ghusl, such as Janabah and menstruation, must be done first to do ghusl.
