Careful with chemical dips. Most are not designed for soaking. Extended stay in the dip or inadequate rinsing and drying will leave a film that is difficult to remove. Dips are good for extremely tarnished pieces, but first try a good silversmiths polish such as Hagerty’s spray which not only cleans and polishes, but also leaves a protective layer to slow future tarnishing. Carefully read all instructions on all these products as many are harmful to certain gemstones (if present).