Help! Grout gone hard before able to wipe it down

[stusgsx]

Yep I agree would be easier to start again

 

[Sean SML Tiling]

For what its going to cost you to repair this job it would of cost the same to have a professional in to do the work.

 

[PaulSmith]

Very good chance of the tiles getting damaged. As above, I'd pull them off and start a fresh.

I do use Mapei grout but straight on there with the washboy or sponge 5 mins after.