Wiped his hands - avoid responsibility for their participation in some unseemly business; face - are coming toils, might spill your tears; wiping sweat - a dream to illness, febrile; feet on the mat - leave home or go to visit; dust from the furniture or something else - the past will make itself felt in the appearance of an old friend of your life; wiping the blackboard - to learn something new, and from a completely unfamiliar to you scope.
If you have seen something of the above did the other person, the meaning of your dream refers to it as if it was a stranger, the interpretation applies to someone in your immediate environment.