To use these insoles, simply remove the existing insoles from your shoes and place these Sidas insoles in their place. Make sure they fit well inside the shoe. For best results, use them in shoes that are suitable for your daily activities. When it comes to maintenance, you can gently wipe the insoles with a damp cloth if they get dirty. Avoid using harsh chemicals or machine - washing them as this may damage the materials. Also, it's a good idea to let them air - dry completely before putting them back in your shoes. If you notice any signs of wear and tear, it might be time to replace the insoles for continued comfort and support.