Stabilized turquoise will not usually be affected by sunlight, but since stones stabilized with resins and plastics, heat can cause damage. Turquoise can also be harmed by caustic chemicals and some cosmetics. It is therefore a good idea to remove jewelry when cleaning your home, washing dishes, swimming, bathing, etc.
A jeweler would never use a steam cleaner or an ultra-sonic cleaner on turquoise, and neither should you. NEVER use chemical cleaners on turquoise. After wearing, turquoise jewelry can be cleaned using warm, soapy water, rinsed in clean water, dried, and then stored in a low humidity area. Tarnish-free jewelry boxes and bags are great storage solutions for all jewelry.