ANSWER:
Yes, you must change the pad, wash the affected areas and renew your wudu once the athan is called and after that you can pray until the time of the prayer is out without renewing the Wudhu or changing your pad.
ANSWER:
Yes, you must change the pad, wash the affected areas and renew your wudu once the athan is called and after that you can pray until the time of the prayer is out without renewing the Wudhu or changing your pad.