This is the coolest thing - I picked it up at an estate sale. I've never actually seen one quite lke this - I have left it in it's "Found" condition. I will leave the cleaning to the new owner. There are no dead or missing stones on the front design. There was a sticky on the backside and there is some gluey residue and I am sure some rubbing alcohol will remove it or just plain warm soapy water but I've been slapped for cleaning things so I won't do it anymore. Some buyers actually like them in that vintage condition. The entire piece measures 1 and 1/2 inches square. It opens to an overall length of 6 inches but it does not completely flold open flat. It maintians that zig zag appearance as shown in the picture. There is some pitting which is indicative of the age of this piece. Overall it is a really cool piece and pretty unique. Another one and only piece.