If you have stained gel nails, there are a few things you can do to clean them. First, try using a mild soap and water solution to clean the nails. This will remove any built-up dirt and oils that may have been on the nails. Second, use a dry cloth to clean the nails. Be sure to use a gentle cloth so as not to damage the nail structure. Finally, use a polish remover to remove any polish or sealant that may have been applied on the nails.