Well judging by your last post you're not trying to keep it a secret any longer. But in case you are, why not buy a magnetic credit card pipe?

You just stick it in your wallet. And when you want to clean it, just pull it apart, scrub, and it just clicks back in place (it's magnetic!).

I personally bought mine off of grasscity, but I think you can find them other places too.

And no, I didn't buy it to keep it a secret from my parents (I live on my own), but rather to keep people like my employer from finding out. :thumbsup: