Q: May I perform salah at office, when I am confused/sure that my cloth is not clean.
A: A decision cannot be based on doubt. If you are not sure, consider the clothes clean and make the Salaah. If you are sure that it is not clean (impure) and the amount of impurity is so much that it is not excusable; which is about 12cm in diameter, then either change that clothing or wash the soiled area and thereafter make the Salaah.
Moulana Yusuf Laher
Checked by: Mufti Siraj Desai