Most applied deposits can be readily removed to enable reuse of a plated spirals (helix) by immersing it in a 50% by volume concentrated nitric acid solution at room temperature, then water rinsing and drying for weighing and subjecting it to another plating stress test.
Stripping the deposit from a spiral (helix) takes 15 minutes to 2 hours at room temperature depending on the thickness of the coating. Make sure all the deposit is removed, then rinse and dry, then visually inspect the spiral (helix).
Silver metal deposits can be stripped with anodic current in a solution of 8 oz/gal caustic soda and 16 oz/gal sodium cyanide.