Coolidors seal in the contents, so it's a good ideato open them up every few days -- a few seconds is long enough,just to allow fresh air in. But this is not absolutely necessary ... humidified to optimum relative humidity (RH), the Coolidor's contents will be fine for a month or two at least.
Any wood/spanish cedar humidor lets are in -- they are designed that way ... so I'd open those at least once a week to check the RH.