If it is actually a PERGO floor, then be very careful with moisture, no matter if it is snap-in or glue in. Pergo is the worst in the business regarding moisture resistance. Actually, there's no laminant floor on the market, that I am aware of, that cleaning with water won't hurt. So be careful.
Pergo makes a cleaning kit, and I suppose they are available on line, that contains two products. One is an after installation cleaning product that is very good for heavy soiling issues. The other is a maintenance product.