about 6 months ago i spilt indian ink on my window ledge causing it to leak onto my curtains. i got a bit of it off, but it's dryed and left a spillage mark with a dark outline, quite large. i know this is going to be hard seen as though it's been 6 months like that but i've tryed bleach, artist soap and turpentine and nothing is getting rid of the dry-line it's left. i need a remover quick so online purchases can't happen and something from the uk/england. the curtains are a thick cotton material. i need to get it off so that i can get my £300 bond back from university :( ..the pains of being an artist ey! thankyou