Problem with condensation

I recently used my camera with a SPKWA Marine Sports Pack during a trip to the Pacific coast of Colombia (it's a zone of tropical marine rain forest), where it was both hot and very humid (rain and marine mist and tropical humidity). While the case definitely protected the camera I was very disappointed by it's frequent tendency to get condensation inside the casing, in particular inside the clear lens window, making it - on too many occasions - impossible to get a good photograph. On such occasions it thus became not much more than a carrying case.