Ok, this is super random, I know but I LOVE keeping the abalone shells when I go to resturants they look so pretty on my desk and I can keep my jewlery, hairties, bobby pins in them but I notice that about a week into it they loose the shine and lustre the seem to sort of "dry out" and then they arent nearly as pretty as they were in the beginning. How can I help it retain the shine and lustre. I knwo when you go to stores and buy them they stay shiny forever. How? I'm so nuts about shiny moneky I even tried spraying that but obviously... it didnt work. Any ideas anyone?