by Dan the man »
Thu Nov 11, 2010 4:42 pm
Ok I do this once a year, put neat bleach on an old toothbrush (or nail brush) and rub it in to the joints, dont go mad with it but give it a bit of a scrub with it, now rinse it down with cold water. After a couple of hours do the same again but dont rinse the bleach off for at least half an our. Once you've rinsed it off leave it all to dry and the grout should now look 95% back its original colour.
Good Luck