You all remember that not long ago the CDF issued a statement that even saying “WE baptize you” etc. was invalid and, thereafter, some priests discovered that they had been invalidly baptized. Therefore they hadn’t received any other sacrament validly, including ordination. They had to be baptized absolutely, not conditionally, and then confirmed, ordained.
Is ‘Baptism by immersion’ valid if the water doesn’t touch the head? Doubtful. Fooling around with a sacrament is a serious matter…..
Praise the Lord