Rather than spend a massive fortune (I was quoted 400-800) on dry-cleaning huge curtains we have at our previous flat (we've just moved out), I wonder if rug doctor actually do job on making dusty cream coloured curtains look clean cream and sparkly? We have 10 of them to clean (why didn't I just ask the landlady to put away all of them at the start 4 years ago?? hindsight is rich...)
(they too huge and too thick to be put into wash)