A few days ago I was in a store, and one of the workers went on a break and evidently ate something. When the worker returned she had (something like) sweet roll icing on her face. As Ms.'sweet roll' walked away I beckoned for one of her co-workers to alert the lady to the problem. The coworker of Ms. 'sweet roll' indicated to me that she was in no hurry to step into an potential awkward conversation.
I thought about if I was Mr; 'wardrobe malfunction' or Mr. 'Pie on my face' I would want a trusted voice to quietly pull me aside and gently explain the situation. I would not want strangers secretly mocking my accidental mistake, so I approached the lady and tried to gently explain the situation.