Use a Silk Wash or pH neutral liquid detergent. If you can't find a detergent that specifies pH level, use one that specifies silk or natural fibres

Hand washing inside-out in cold water (no higher than 30°C) is preferable

You may machine wash in cold water (no higher than 30°C) on a delicate or silk cycle, inside-out and in a delicates wash bag

Flat dry inside or line dry in the shade (inside-out)

Dry cleanable (no trichloroethylene)

Iron or steam low heat inside-out