hi gillo,
weve got the same problem.our floor lasted 6 years.Ive considered getting a new laminate floor from ikea.cheapest.
also found this website.how to sand laminate floors?
http://www.ehow.com/how_6625153_sand...te-floors.html
or you can get laminate floor reviver or different colour sticks ( pencils ) that might work.i havent tried anything yet.