So I've started collecting coins over the past few months. I've ran into a bit of an issue and was wondering what you guys think may be causing it. I have a few .999 silver bullion coins, like Silver Eagles, Libertads, and Chinese Pandas. I've only had them for a few weeks or a couple months at most. I've had them in capsules sitting on a display shelf in my bedroom. I've noticed that already, within just a few weeks, all of them (some worse than others) have started developing some spotting and hazing. On some, it's really noticeable and definitely makes them worth significantly less. This isn't caused by fingerprints, though they seem to be developing a grayish or whitish haze that causes fingerprints to show up that were already on the coins and were previously not really noticeable. This hazing looks different than regular milk spotting, and it's ruining the coins. I have three culprits: cigarette smoke, moisture, and heat. I can't think of any other causes that would be present in my home. What else might be causing this? My mother-in-law smokes in the house, a lot. Like, a loooot a lot. Her house, her rules, yadda yadda. I don't have any control over her smoking in the house, until my husband and I can buy our own place in a couple years hopefully. Till then, heavy cigarette smoke will definitely be present in the house. She doesn't smoke in the bedroom near the coins, but it could still be causing this heavy, unsightly sort of hazing. Thoughts on this culprit? Then there's heat. Up until this week it's been quite warm where I live, well up in the 80s and 90s since I've had these coins. My house does not have central AC. We have window units, including one in the bedroom. Which we used when it was hot, but still, the bedroom stayed quite warm. Probably warmer than it should have been, but our room was never extremely hot. And the moisture. I think this is a possibly a big factor. The window unit probably draws in too much water and moisture. I don't have a way to measure the humidity in the room, but I know it's high. I live in a very high-humidity area and no matter what, it's always very humid in my house, with the window units probably contributing a lot to it. So, what do you guys think? Anything else that may be causing it? What should I do? Try to store them in something completely airtight? Because capsules and TPG slabs, for example, aren't. Any help at all on this would be greatly appreciated. It's been really disappointing, but I'm learning from my mistakes and trying to change the way I store my coins from here on. Or I might just hold off on buying higher-premium silver altogether until my environment is better-suited for them. Thanks again for the help!