Whenever you are done using the product, ALWAYS strain the liquid through cheese cloth to pull all the rust particles and contaminants out of the liquid. According to the rep I talked to, he said that the product will continue to work (and wear out) if it has something to de-rust so eliminating those particles from the bottom of what ever container you are using will prolong the life of it. Same goes for using a sprayer, strain it before running it through the spray nozzle.
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