Using these insoles is easy. Just take out the existing insoles from your shoes and put these Sidas 3Feet insoles in. They are suitable for most types of shoes you wear daily. When it comes to maintenance, you can gently wipe them with a damp cloth if they get dirty. Avoid machine washing or using harsh chemicals as it might damage the materials. Make sure to let them dry thoroughly before putting them back in your shoes. Also, if you notice any signs of wear and tear after long - term use, it might be time to replace them for the best performance.