I'm sure I'm not the only one who collects jerseys, be it Inter or some other clubs/NTs, in this forum.
I usually keep my jersey folded, and put them in a drawer. I haven't used some of them for years (literally) and when I was moving out to my new house, I was horrified as I unpacked them out.
As you can see, the printings from the names and numbers were slightly melted and they were sticked to the jerseys. I tried washing them out, but they just couldn't come off.
So my advice is: Keep your jerseys hanged instead of folding them You have to watch out not only for the prints at the back, but also the Pirelli printing in front. If you insist in folding them, open it up every month or something. This advice is particularly important for those who live in a tropical climate as I think the heat acts as a catalyst in my case.
Not done yet, I have another advice for you guys. If you buy our jerseys, try to stick whatever patch (Scudetto, Coppa Italia, CL, CWC, etc etc) yourself. I just realized that the shop that I asked to stick them out did a Muntari-esque job in my jersey.
Hope these help folks.