One of my YouTube viewers wrote me recently asking whether it's ok to reapply more makeup after work before she goes out for the evening, without washing her face first. She said the only thing available to wash her face is the hand soap in the ladies room and should she use it.
Well, if all you have is the hand soap, then I wouldn't recommend using that. Some soaps contain detergents that can strip skin of important moisture causing dryness, irritation, and even rashes. Best to just reapply some more makeup. If you want to remove excess oil, simply pat the shiny areas with some toilet paper or a tissue, then apply more makeup. You can even use a little powder to help absorb excess oil.
A good solution would be to keep some makeup remover toilettes in your desk drawer so you can freshen up easily and you're ready for happy hour!