Generally nothing is needed when you use the BW Space Pro in freshwater conditions, but special care and cleaning is required when used in salt water. Even though YouCan uses high grade materials, very few things are impervious to corrosion.
This is why we highly recommend rinsing your drone out by submerging it in the bathtub and OPERATING it at full throttle while shifting it side to side. This gets out any sand and debris.
These rinsing directions fully remove the salt water and sand trapped by the propeller.