Is temporary dryness and bathing thereafter sufficient for the prayer to be valid, or is it necessary to wait for the complete cessation of the yellowish discharge?

If dryness is achieved, even for a short period, the ruling of menstruation is interrupted. This is done by inserting a cotton swab that comes out clean, free of blood, yellowness (ṣufrah), and turbid discharge (kadarah). If yellowness or turbid discharge appears after dryness, it is not considered menstruation. However, if dryness is not achieved and the yellowness is continuous with the blood, then menstruation persists, provided that the discharge of yellowness does not exceed the maximum duration of menstruation.