Should we use a new set of washed clothes every time or for example when we wear a set of clothes during the morning ritual, can that be used again in the evening?

Though it is not a taint to wear the same set of clothes worn in the morning for the evening, it is better to wear a fresh set of clothes again to perform evening austerities as per the practice of our elders. If we use the same cloth the next day, then it is considered tainted.