Empty sugar packets aren’t very absorbent.
All they do is transform the few drops of coffee on your desk into long, invisible, sticky streaks. You should have got up and gone to the little kitchenette, wet a towel, grab another dry one, and given your whole desk a good wipe down.
Look around, you’ll see it’s necessary; crumpled napkins, grains of sand, empty cardboard cups.
But you got in late, and could feel your lead staring at you, even though he pretends to be engrossed in whatever is happening on his computer screen.
You could do it later, I guess.