Handwashing will increase the life of colored cashmere silk blends garment.
When your cashmere silk blends garment needs storage for season change, please put it in a breathable cotton bag with zip closure.
And you can also put a little mothball or cotton ball soaked in lavender oil to repel bug.
If you wash with machine, you should also clean your washer with cleaner to get rid of any machine building up, lime scale and rust which may damage the cashmere silk blends fiber. Add some machine cleaner to your machine dispenser and run a load with hot water and then a load of clean water, then you got a clean machine for our cashmere silk blends.