What should I do to be able to pray if my underwear becomes soiled with urine at work while I am in the restroom? Should I remove it, sprinkle water on it, or wash it and then perform ablution?

Underwear or other garments soiled with urine are purified by pouring water over the soiled area until the impurity is removed; sprinkling is not sufficient. If one does not wish to purify the soiled garment, or finds it difficult to do so, and wants to pray, he may remove it and pray without it.