The ruling on the presence of a trace on the garment after sleeping and performing the full ritual bath

Question:
He says: If a person is uncertain about the presence of a patch on his garment, and he does not know whether he should perform the full ritual bath as a precaution?

Answer:
If this is a trace from sleep, meaning he woke up and found an external trace or moisture on his garment, he considers it semen because he was sleeping and not aware. He is required to wash it for the sake of cleanliness, not for the sake of ablution. Semen is pure, but it is washed for the sake of appearance. However, he is required to perform the full ritual bath from major ritual impurity if he finds moisture on himself or sees a trace of semen on his garment. This means he had a wet dream and did not know it. It is obligatory for him to perform the full ritual bath from major ritual impurity. Yes.