For rings and jewellery, with hard to get into mounts, I use a very very soft headed baby's toothbrush, and apply a little squirt of washing up liquid, gentle brushing into those awkward nooks and crannies, and then rinse under the tap - and buff dry with a microfibre cloth. I dont put them back in a box, i have a ring roll in my jewellery box, and with that I have put a little silica pack, (you get them with new shoes, or new handbags) you can buy special acid free tissue paper, that you can line a necklace box with, and put your rings in that. I dont mix my silver with white gold or yellow gold. I have trouble like this with my Brazilian Fire Opal ring, the day i got it (this march) 5 stones where immaculately crystal clear and zesty, and one was very dull, opaque, and sticks out like a sore thumb; I have cleaned the BFO with advice from this forum site, all 5 come up wonderfully shiney and bright, just this one obstanate little beggar - he just wont shine - so now i dont wear him that often, I had him replaced with a Maricota Amblygonite - gorgeous and sparkly and zesty lime! xx