For a cigar smoker keeping your sticks in prime shape is so key. A friend of mine Anthony is having problems with his desktop humidor and his cigars keep going bad. Here is a great instructional video detailing how to keep your humidor at peak shape.
Personally I like to wipe down my humidor at least twice a month with distilled water for starters. For added back up I keep two shot glasses of distilled water at the bottom level and two 75 degree Boveda Humidipaks at the top. Most importantly invest in a digital humidity reader as the analog are almost never correct.
What is your technique for keeping your humidor at the right humidity levels?