To clean use a soft cloth and mild soap as needed. Do not clean with alcohol or rubbing alcohol or any solvent of this kind. It will strip the paint from your pieces. Clean the ear wires in the same way. Do not use store bought silver dip type cleaners.
We can’t guarantee they are chlorine safe, so don’t wear them in the pool. And We’ve had mixed results with salt water - sometimes fine, sometimes not - so best to avoid long exposure to salt water as well. Wearing in the shower or tub should be fine.