Whats been your best cleaning method Perp?
Provided it really is micro-suede, made of polyester, rather than suede, made of cows, it's really hardy and very difficult to screw up.
I use my carpet shampoo unit with an upholstery attachment (I invested in a Hoover carpet cleaner - gosh the new ones are a lot cheaper than mine, see for example this
American Hoover site). But if you don't have one, or want one, you can usually hire one from your supermarket.
I've used the soap that comes with it, a mix of vinegar and hot water (about 20% vinegar), dish detergent, wool mix - they all worked! But I'd try the simple, less soapy, vinegar and water first. The soapy ones, I've heard, make your surface get dirty again more quickly, because the same action which causes dirt to bind to the shampoo when cleaning, causes stuff to bind to the soap residues. Whether that's true or not, no idea, but it sounds logical and the vinegar and water works, so that's what I use.
PS Next time, consider decorating using a dark grey/brown neutral. That's what I did last year when renovating, and it was an inspired choice - when your furniture and carpet is dust/dirt-coloured, it never looks dirty!