I have question about ibada. If im in the office with no spare pants, and I have some maybe tiny seminal fluid on my pants, can I just wash it by spraying at the spot where the fluid is and rub untill i “think” it’s gone?

If it is seminal spot then go in wash room or toilet and wash it. If only that part washed then it become pak and you can pray in this pant the method which you mentioned it will not help in taharat.