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The most important part of post-dive maintenance is cleaning the motors. The exposed magnets tend to corrode easily. The bearings also need to be lubricated and protected from rust.

First, rinse the motors with fresh water (see previous step)

Then thoroughly dry the motors with compressed air (if available).

Immediately afterwards, re-apply spray silicon lubrication. Move the motors with you hands for a few rotations to ensure that the bearings are well lubricated. Review the previous steps on proper lubrication. This should be done before and after each and every dive.

WD-40 is great to keep the motors from corroding as it displaces any water. It is not as great as a waterproof lubricant, however and should be used in conjunction with another, more water-resistant lubrication.