When washing turn the garment inside out. Either remove them or, if dry cleaning, cover with foil. Wood buttons should not be washed and should be protected from moisture. Waxes and polishes can be used but protect the garment when applying them.
Rhinestone buttons can be delicate.
They should not be washed or dry cleaned as stones may loosen or even discolour. Button pins are a great inexpensive alternative to removing and resewing buttons. Find them on the last page of the price list.