Using these Superfeet orthotic insoles is easy. First, take out the existing removable liner from your moderately roomy shoes. Then, place the Superfeet insole in the shoe. You can trim it to fit your exact shoe size. When it comes to maintenance, keep them clean. You can gently wipe them with a damp cloth to remove dirt. As for usage, these insoles are built to last up to 12 months or 500 miles. If you notice a decrease in support or comfort before that time, it might be time to replace them. Remember, they're great for people with high arches, so make sure they match your foot type for the best results.