I've recently purchased this lovely dress. It's cotton and apart from a bit of fade is in lovely condition. Normally I would give a cotton dress a gentle handwash but this one has rhinestones dotted all over it and still has intaced interfacing/lining so I'm debating if I just steam and air it? Any thoughts or washing tips welcome. There are some faint brown spots on the bodice lining which I thinkay have come from the rhinestone studs in a previous wash.