The sleeve of my gi has been bloodied up a fair number of times from people getting cut or what not (I assume), and I never thought much of it. But I think it's starting to look kind of nasty. Anything I can do about it?

Likewise, the knees of my gi pants have picked up a ton of lint after accidentally washing them together with some old tshirt or something (some items from a previous load were left behind when I put my gi in).

Bit concerned it's picked up mold or something, rather than just lint? Wash immediately after every class and hang dry on a rack in sunlight, so it doesn't feel like it SHOULD be mouldy...