I've got this futon and I made the mistake of leaving it on the carpet through the summer. Lo and behold it got a little musty on the bottom. I noticed when I started smelling the mouldy smell coming from it. Apparently there was more moisture in that floor than I had thought, and it crept into the futon bit by bit. So...how do I get the mould and the blackish stains out? Is there a good solution for this? I'm not talking about really big stains here, but stains nonetheless.   I tried putting it in the sun today to kill the mould (hopefully).

- LH