My 6-year-old mattress has 2 big cracks through 2 foam layers. The warranty was denied because of "Significant Stains". This is false. The mattress color is nearly the same as new, with only a small amount of greying on the white cover. The mattress itself shows almost no discoloration, as the photos show. There’s definitely nothing that would cause 2-foot long tears through 2 foam layers.