Using the Deltana 12 - inch Friction Casement Adjuster is a breeze. Just install it on your casement window according to the included instructions. Once installed, you can open your window to any position you want, and the adjuster will hold it there by friction. It doesn't need any knobs or levers, so it's very simple to use. When it comes to maintenance, a quick wipe with a soft cloth every once in a while will keep it looking good. Avoid using harsh chemicals as they may damage the finish. If you notice any issues with the adjuster's friction over time, check for any debris or dirt that might be affecting it. Overall, this adjuster is a great addition to your window, giving you better ventilation and a touch of style.