I have recently learned that my wudu’ has been invalid since I have been wiping over my cotton and nylon socks. Am I required to perform salaat al-qada for all the fard prayers in my life in which I achieved tahara through performing wudu that included mash over modern socks?
Since Wudhu is a condition for Salaat and your Wudhu was invalid, your
Salaat will have to be repeated. You will have to perform Qadhaa for all
prayers performed by making Masah over the cotton/nylon socks.
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai