well - without being "that guy" who has to hammer you with the obvious - be very careful, use nothing abrasive (as in softer than common paper towels), your favorite glass cleaners will suffice - and when you get into them - I'm thinking q-tips for the edge work... if you have to go "'wet" to the insides to remove stubborn $h!t - be very very light with it - getting H2O out of those crevasses is a bugger.