Cleaning of the glass during the construction period and after is necessary and essential to maintain the aesthetic performance. For normal cleaning, the use of a soft, clean, grit-free cloth (sponges and chamois are recommended) and a mild soap, detergent, or slightly acidic (vinegar) cleaning solution is recommended. Care should be used when washing with industrial solvents containing elements such as carbon tetrachloride since they would mar or dull the surface. Rinse immediately with clean water and remove excess water with a squeegee, taking care to prevent metal parts of the cleaning equipment from contacting the glass surface.