I store mine in Rubbermaid bins....and I even have some in cardboard (Avon) boxes....which I already know is BAD for it but I do it....I move it around so much that it doesn't have time to get bad....I'm in them ALL the time! and they don't even end up in the same bin or box....when I put them away again they are all refolded just by chance... I don't worry... some of my older stuff I've found stains on...I just cut around it...and use it...
If I was doing this for contests or something I would buy new ...but for me right now most of what I make is for fun...relatives, me, whoever....so it works for me!
When it gets really bad...hubby gets new rags for his garage!