thought we had a haze of grout, we used water, vingar then cement grout haze remover. haze remover took out the grout in the areas where we need the grout. It was
Aqua Mix Cement Grout Haze Remover - 32 oz Quart - Removes Cured Grout and Mortar Residue - Efflorescence, Rust, Hard Water Stain, Lime Deposit Cleaner - For Tile, Granite, and Natural Stone - Amazon.com