At one of the places I worked as a manager I oversaw a staff of in-house techs that made desk-side calls when things needed done. After many complaints, I had to have a talk with one of my staff because he smelled and that I couldn’t have him come back to the office until he cleaned up. After that I had weekly check ins with him until the new hygiene regimen became routine.
That was one of the hardest conversations I have ever had and the look on his face killed me.