[header] How to clean grout haze [title] Wait a day for the grout to set. [step] Grout haze often appears soon after the grout and tiles have been installed. If you are cleaning grout haze off of tiles that have recently been installed, wait a day for the grout to set. 
This will allow the grout to firm up so it is not damaged when you are removing the grout haze. This is key if you have smooth tiles made of glazed ceramic or porcelain.