If it didn't smell, then it's likely condensation though how it would get there is beyond me. I've had mine out once to look at it and no moisture problem. Maybe your mattress is haunted??
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2010 3150RL
LevelUp, Dual 6 volt batteries, Progressive Industries EMS HW50C, Honda EU2000i Generator, Bridgestone Duravis R250 tires, Torklift Glowstep Revolution Stairs, LED Tail lights
2015 RAM 3500 Laramie SRW LB CC Cummins 6.7L Aisin Trans B&W RVK3600
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