Hi TJ.
Helps now I've read your previous post
I always with Mapei mix either 1/2 or full bags depending on area, tile size etc to the water ratio.
I always wait the same amount of time before I wipe with the washboy, and use the same washing routine everytime.
To date, even on large areas I haven't had a problem - not telling you how to suck eggs etc.
My supplier read me the riot act 1st time I'd bought it and gave me the fear of God!
Must have worked though lol