Hi all would appreciate some advice on how/when you clean your grey grout off black tiles. when I have started cleaning off grout in the past and present job the residue takes some getting off the tile. I leave the grout for the required setting time before cleaning off a few times. Is it best to then wait for the grout to fully set then clean remainder the following day ? how do you all approach this problem. I have tried both sponge and washboys. thanks in advance

HI..

I use a white scotch pad.. to loosen then a damp sponge for clean up.

George - with modern day grouts you should be able to leave the job 'finished' when you leave a job.
If you grout a job and wipe off the excess with a sponge/washboy the surface haze will be okay to polish off within an hour at temperatures above 5degrees.(or so I'am told by my son).

As above, if you wash the grout off well (make sure you rinse your sponge out as often as poss) the haze that is left should come away pretty easily and soon. Sounds like you might be smearing the grout about on the face of the tile or letting the grout set to much before washing off.

might be worth investing in a new grout float. after the grout goes in, a good float will take away most of the excess, with a light sponging after to remove the rest. just a very thin dust left that can be taken off with kitchen roll after an hour or so when completely dry.

cheers all for promt replies, the tiles are slate effect and removed as much as possible before cleaning and tiles do seem to come up clean but think im dragging out the grout probably could have tried dusting off rather than constantly cleaning thanks again. with ceramic it always comes off with a dusting but these bad boys are holding on to it.

Best advice I can give is to work clean from start to finish. When grouting, take off as much grout off the face of the tile with your grout float, then leave it to set off just enough. To long and you will have to scub it away and to soon and you will pull the grout out of the joints. When wasing off, use clean water and a clean sponge and rinse the sponge out as often as poss. If you need to, keep changing your water for clean stuff and wash off more than once if it is still a pig to clean.