It sounds like you're very frustrated at your "aerobed" mattress so you went to Target and bought a Coleman mattress. You may be interested to know that Coleman manufactures Aerobed. They are all made by the same company.
Here is a link to repair of the outlet valve. I can't post the pictures, but you can go to this link and see the entire repair procedure to clean/reseat your valve. The instructions describe a "black valve" the same procedure applies to the white and the cream colored valves. On mine, this completely fixed the problem. Hope it helps you.
http://www.aerobed.com/Assets/manual...structions.pdf
In the owner's manual, there's a caution that says DON'T INFLATE THE BED WHEN COLD AS IT MAY CAUSE LEAKS..........