Before cleaning
Read the sewn-in instructions on each piece, including any separate lining or removable trim. Check pockets and fastenings before choosing a cleaning method.
A loose thread in lace
Lay the garment flat against a contrasting surface so you can see the lace pattern. If a loop has caught on jewellery, ease the jewellery free before lifting the dress. Cutting or pulling a loop can open a larger gap.
If the lace has started to separate at a seam, set the piece aside for repair. A photo of the area against plain paper can help a repairer see which stitches have come loose.