Namaste, Daily recital of स्वध्याय ब्राह्मणम् (2nd प्रपाठक - तैत्तिरीय आरण्यक) is a cleanser ....Ask them to learn from a good guru before reciting daily after sandhya. There are couple of कूष्माण्ड mantras that are capable of removing the sins. rgs, sriram