Think I have another problem.
After my run in with the Ditra and the Keraquick adhesive, I got worried about my ability to do a good enough job so I reverted to plan 'whatever' (just pick a letter, there were so many at one point) and got the plumber who was putting in my bathroom to do the tiling. My bottle went, simple as.
Anyway, he's done an acceptable job, bits here and there that a professional tiler probably wouldn't have done, but on the whole, okay.
However I'm just cleaning the bathroom today for the first time since it's been tiled and the grout (Mapei Ultra Colour Plus) on the floor seems to be rubbing off on the cloth. The floor has been tiled for a week, it was the first thing to be done. When he did it, the grout seem to sag back and sink between the tiles when it dried. After he'd done all the wall tiling he added more grout to the floor tiles to bring it back up to the usual level and it seemed fine until today when I went to clean the tiles.
The bathroom hasn't been used at all since the work was done as we'd moved out during it all. I was going to put Seal Guard on the grout tonight, ready for us coming back tomorrow and starting to use the bathroom but I don't know what to do now.
Will the Seal Guard help harden the grout up and stop it from rubbing out or have I got a bigger problem?