Take care of your jewelry and it will take care of you.
Sela+Sage recommends removing all jewelry before showering, swimming or exercising. Sterling Silver jewelry may be stored in an airtight container to prevent tarnish when not in use. If tarnish develops Sela+Sage recommends cleaning wipes to safely and gently remove the discoloration: https://www.amazon.com/Cape-Cod-Polishing-Cloths-0-53oz/dp/B0017H3PIO
For clothing it is recommended to wash all clothing inside out and or inside a mesh bag for tunics and dresses. Hang dry, tumble dry low if needed.