After your ride is finished and the battery is removed, attach the rubber connector protector to the jetpack and use the Radinn water bottle to rinse the board with fresh water.
Also check the jet tunnel and carefully remove any possible algae or debris that may have gotten caught in it during your ride.
In order to use the full potential of your Radinn battery, you should run the “Battery Optimization” function after each ride (see FAQ “What is the Battery Optimization function on the Radinn?”).