The normal procedure for cleaning laminate flooring is to:
Sweep or vacuum with a non-beater bar vacuum cleaner (use the hard floor attachment)
Occasionally damp mopping when necessary-- For best results add 1-cup vinegar or 1/2 cup ammonia to one gallon of water, or use laminate cleaner.
DO NOT USE Scouring powder, steel powder, floor polish, detergent polish, floor wax, soap wax or soap-- residue from these products binds dirt with the surface structure and is extremely difficult to remove
Remove stains with denatured alcohol or a small amount of acetone on a damp cloth.
Chewing gum must be allowed to dry thoroughly before scraping it away with a blunt scraper
Minor marks or indentations can be repaired with laminate finishing putty.
For major damage replace the entire plank professionally
Cleaning Laminate During Installation
During installation, residues of glue mixed with water can give the floor a blotchy appearance. This removes easily by cleaning off the excess glue with a damp cloth and then buffing dry.