steam cleaning, patch replacements, full replacement. a dentist will be happy to assess your needs and give you tips on how you can better maintain your oral health. best of luck to your interesting projects. i am the daughter of retired teachers so education has been a huge part of my life. shops have steps in their doorways. you don’t have to drive to and from a brick-and-mortar school to get the education you need. for more information visit the docs. you can easily replace the ear cups and audio lead. 