Using these Fisher & Paykel glass support clips is a breeze. Simply attach them to the basket tines in your DD60 or DD90S DishDrawer dishwasher. They're designed to hold tall glasses securely during the wash cycle. When it comes to maintenance, there's not much you need to do. Just give them a quick rinse every now and then to keep them clean. As for the guarantee, if you encounter any issues, don't hesitate to reach out to us. And remember, if you're ever unsure about whether these clips are right for your dishwasher, always check with us first by providing your model number and product code.