How do I keep my cards from getting dirty in my wallet?

Ugh, tell me about it! Dirty cards are the WORST. My wallet is, like, a black hole of lint and… I don't even know what. It's gross. I've seen those zip-around wallets, and they do seem like a good solution. Keeps everything kinda sealed up and safe, right? I really should invest in one. Or maybe just clean out my current wallet? It's probably a biohazard at this point. Remember that time I pulled out my credit card to pay for coffee and it was, like, covered in… was that fluff from my pocket? So embarrassing! A plastic baggie is a good idea in a pinch though. I used to do that with my gym card back in college, because it kept getting scratched up in my backpack. It worked pretty well, actually. Maybe I should try that again. Anything's better than fishing out a grimy card. You know what I mean?