The manager who stays to mop with the closing crew never has to ask for loyalty.

Willingness to do the worst job on the rota says more than any speech about being a team. It removes the sense that there are two classes of person in the building, and everybody can tell instantly whether it is genuine or a visit. The result is not gratitude. It is that people stop conserving their effort, because nobody is watching them from a distance.

Take the least appealing task once this week, at the end when it is least visible, and do it properly. Say nothing about it afterwards. Do it again in a month so it reads as character rather than gesture.