Clean your silverware and knives with rust spots using lemon juice. Eventually, stainless steel silverware and cooking knives can begin to get spotty with rust, especially if you use the dishwasher to clean them. Just take your rusted silverware or cooking knives and soak them in a glass of lemon juice for a couple of minutes. The rust will loosen up, making it easy to scrub away… just make sure to hand dry it afterwards!