Drinking glasses that continue to get a haze on them after being washed.?

We have some drinking glasses imported from Italy that no mater what type of dish soap is used or hand washed or dish washer washed they continue to get a haze on them. None of our other glasses in the same cuppard do this. What is causing it and how can we stop it?Drinking glasses that continue to get a haze on them after being washed.?
Palmolive just came out with a new dishwasher liquid that has vinegar in it, it works great. (Purple bottle) If you're washing by hand, just add a little vinegar to the water. Works great!!!Drinking glasses that continue to get a haze on them after being washed.?
Ooo,might be something they're coated with.I don't know if I would drink out of them with the haze or not.However,if you put some vinegar in your dish water,it should remove the haze.I would add about half a cup and see what that does.DO NOT put vinegar in the water with anything that has a pattern,or anything.Make sure everything is plain.I used to do that because it helps get dishes cleaner,and it ate the picture off of one of my glasses.
Try checking out www.Care2.com They have a lot of good cleaning tips, etc.
Add vinegar to liquid dish detergent
Are they frosted glasses? It's possible that they are supposed to have a frosting on them. I don't what the specific term is, but for example we have a decorative mirror panel in our bathroom -- when I clean it, it looks like a normal shiny mirror, and then it hazes over to give it a matte finish.
Try rinsing in vinegar and then in water.