Seals on "waterproof doors"

My Optio W30 "waterproof-for-30-minutes-at-10-feet-of-depth" camera has two access doors, one to the communication ports, the other makes the battery-compartment and mem-card watertight.

This photo of a damp Q-tip used to clean those sealing surfaces makes clear why you want to do just that, every time you open them.

Judd