Foil textured pieces can be scrubbed using a new suede brush, washing-up liquid and running water. Always protect any polished smooth areas with masking tape and then, upon removal, these delicate areas can be polished using an appropriate commercial cleaner or impregnated cloth.
Polished and smooth pieces must only be cleaned using an appropriate silver polish or impregnated cloth.
If you would like me to restore your Alexandra White piece to its original glory, please get in touch. I charge a nominal fee for my time/postage but am confident that you will be happy with your newly revived 'sparkling' jewellery.