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if i can remember correctly, i started with hosing it all down maybe using simple green and scrubbing..let it out the drain..on land..while keeping in the ocean, added some tide ..just a few onuces..the constant motion got it under the fuel tank and areas unreachable, and kept self cleaning over a season or 2..good luck..my lower areas are sparkly clean now..ps also had to clean the bilge float and bilge cuz they were fouled