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I wash with fresh water, usually a few dunks up and down, and I treat my gear with food grade silicone after any lengthy vacation before storage.
Do you think this is a knock-off, perhaps I should send it in to them. From my experience, it looks to me like the blade may be high quality stainless, but the fasteners are rusting.
Still cuts well, glad to hear my experience is a fluke, this is after only 45 dives/4 months.