The UGA Preventative Measures Advisory Board has produced guidelines specifically about ensuring proper hygiene for microscopes, which may be followed for any instrument that includes eye-pieces. After making sure the instrument is turned off, PMAB recommends applying disinfecting solution (at least 70% isopropyl or ethyl alcohol only) to lens paper—do NOT apply directly to the instrument—and wiping down its components, paying particular attention to common touch points such as eye-pieces, focus knobs or stage controllers.