Rules regarding Wudhu
305. If a person doubts too often about the acts of Wudhu and its conditions, like, regarding the water being Pak, or it not being usurped, he should not pay any heed to such doubt.
306. If a person doubts whether his Wudhu has become void or not, he should treat it as valid. But, if he did not perform Istibra after urinating, and performed Wudhu, and thereafter some fluid was discharged about which he was not sure whether it was urine or something else, his Wudhu will be void.