Sometimes we can find that there is “Rust” on the stainless steel products surface after using for couple of months.Is it the exact rust that can’t be removed? Actually it may be caused by zero cleaning work. Try to wipe it with sandpaper or scouring pad,if it can be removed then it’s not “Rust”.It’s only covered with dirty things like iron content ,or acidic stuff sticking on the product for a long time without cleaning, and then the surface “rust” produced by the oxidation reaction.For long term usage, we should keep the stainless steel products cleaning from time to time.And keep it away from acidic stuffs.