and could be very hard to mask or eliminate. If you have to keep the matress consider getting a mattress cover that will encase the mattress. This might make it less noticable. Also, sprinkle baking soda all over the mattress and even consider placing it out of doors in the sunlight for a while if you have any this time of year. In the Navy we called this air bedding. Those mattresses in the 70's were very old. Seems to have worked then.