Hi, I am new to cooking tofu. I bought the extra firm tofu and wanted to cut it into nice neat cubes to bake, but it was anything but firm when I opened the package and it fell apart into a rather wet mess... I was able to cube some of it but a lot of mush got wasted. Should I have refrigerated it first? My supermarket does sell refrigerated tofu also, but it's labelled 'silken' so I thought that would be soft and I want firm. TIA!