Glue it back together and put it in a display. Heck it's not going to get better? You can hang it on the wall and not get upset when it fads from the light. But it's a nice conversation piece.

Yes... when I first started collecting, I bought a box of chips and decided to try cleaning them in the dish washer. (hey, it didn't sound that stupid at the time?) I ran 10 or 20, I don't remember how many.

They came out clean, but dried out and faded. After some restoration with oils, they looked better than the ones I didn't test clean. A year later they looked dried out again.

A couple warped from the heat.

Small bit of advise, don't bother. It's easier to clean them one by one with glass cleaner and an old tooth brush (I use a childrens soft) than it is to spend all that time trying to reconstitute them.