As mentioned before, it is a good habit to put some plain water in the mixer grinder jar and run it on the mixer motor whenever you finish a mixer grinding job.
To clean the body of the mixer motor, the first thing to do is to pull out the electrical plug of the mixer motor and not to use the mixer for about half an hour to allow any water that has seeped into the speed controller of the mixer jar motor. Only use damp cloth to wipe the mixe motor base and then again wipe with a dry cloth.
Never ever spray cleaning solutions on the mixer motor base, because these strong detergent based cleaning liquids could seep into the electrical switch of the mixer motor and cause electrical short. Also it is better not to use detergents like Vim liquid or others to clean the body of the mixer motor.