Tip tinner is a speedy and effective product for cleaning and re-tinning de-wetted soldering iron tips that cannot be re-tinned by sponges, pads or rosin cored solder wire. In simple terms - If your soldering iron tip won't take solder, try using the tip tinner to restore life back into your tip. Simply wipe your soldering iron tip across the surface of the product, then apply solder. Give your tip a wipe on a sponge and it should then be ready for use again.