What is the ruling on ablution (wudu') and prayer concerning vaginal discharge that is not felt when it exits, causes repeated ablution and hardship, and does it nullify ablution?

Vaginal discharge (vaginal moisture) invalidates ablution (wudu') but is ritually pure (tahir). The general principle is that nothing is considered to have exited unless there is certainty, and there is no need to search or inspect. When there is certainty of its exit, ablution becomes obligatory. If its exit is continuous, the woman performs ablution after the entry of the prayer time and prays with that ablution both obligatory and supererogatory prayers, similar to someone afflicted with urinary incontinence (sahib al-salas).