For stains such as coffee, red wine, etc use lukewarm water with a conventional acidic household cleaner if needed. Tough stains can be removed locally with commercial stain removers such as white gas (benzene) or thinner. These products will not damage the laminate flooring in any way. However, always apply the solvents with a cloth and never directly onto the laminate flooring. Make sure there is sufficient exposure to fresh air and subsequently use water to neutralise the cleaned areas.