I know nothing of glassware so bear with me. I have some Fostoria tableware, different sized plates and glasses, that are cloudy. These were located in my grandmother's house. They were never used or washed because they had the Fostoria Made in USA stickers still on them. They had been kept in a wooden china cabinet for at least the last 40 years. No air conditioning or heat during that time so temperatures varied. And this is in Florida, near the Atlantic, so we're known for our humidity. How long she had them before that, I don't know, so I have no idea how old they are. They looked dirty and cloudy so I decided I'd wash them. I washed them by hand with Dawn and air dried. They're still cloudy looking (see attached pictures). I took a couple of the plates and soaked them overnight in vinegar - no change. Tried again and added some Dawn this time - no change. Other glassware in the cabinet looks great. Hand washed it and it is crystal clear (no pun intended). Does anyone have any idea what is going on here? Any idea how to clean these up? I've done some google searches but with no luck. Most results are about hard water. Well these looked cloudy before being washed. They had never been washed! I read about glassware in wood cabinets and that it can affect the glass, but then why did it not affect all the glassware in the cabinet (seems to just be this Fostoria set)? I'm hoping the experts on here can help me out! Thanks in advance. Jeff