bought an adjustable bed about 2-3 years ago,have kept mattress cover on it, recently noticed musty smell, took mattress cover off, rusty looking splotches all over the mattress. top , bottom, down the sides, thought it was mold although no mold in my home, mattress has never been wet or damp. tested for mold, which was negative, was told could be adhesive from the mattress. I paid good money for this mattress , why would adhesive be coming up out of it. plus it smells, cant use it, was told not under warranty, called regional manage who was out , another person called me, left a number that was a private number cant reach any one about this issue. Very dissatisfied with this service and mattress, will never ever buy another Denver mattress product again. will be calling the better business bureau!!!! User's recommendation: do not buy a dever mattess ever!!