i bought a abrasive microfibre cloth in asda living today for a £1 and it's brilliant. sorry i can't find a link, it was with some other random offer stuff but near buckets and mops etc. it said it was for grill pans and bbqs. anyway it was the only cloth i could find in the shop so i thought i'd try it and now i wish i'd bought 5.
the abrasive side is ace at cleaning walls and removing wallpaper paste etc then the sift microfibre side wipes up al the excess sugarsoap solution leaving the wall almost dry.
sorry for such a boring post but i just had to share my excitement - god my life is dull!!