Must one repeat the Maghrib, Isha, and Fajr prayers if traces of mathy (pre-seminal fluid) are found after ghusl and prayer, knowing that it is the same trace that was washed off previously?

If a person verifies the washing of madhy then finds more madhy in the morning, it is apparent that it is new madhy and should be attributed to the nearest time of doubt. His previous prayers are valid. However, if he predominantly believes it to be the original madhy and prayed with it unknowingly, then all his prayers are valid, according to the more correct of the two scholarly opinions.