Sleeping Sideways in a King Sized Bed.

For those of you who are a few generations older than I, no I did not get the lyrics to the song wrong! You see four years ago when we moved into our house we bought a brand new king size bed with a beautiful semi firm pillow top mattress, it was luxurious to sleep in. That is until about a year  ago we have been faithful at turning the mattress every six months but it has in turn faithfully gotten two troughs on either side of the mattress. One Darcy sized trough and one Jenn sized trough, many nights we toss and turn keeping each other awake trying to get comfortable. So three nights ago now I suggested to Darcy that we sleep sideways yes with our heads on one side and feet at the other Darcy barley fits his feet hang off the end just a bit but I fit just fine ( there are some advantages to being five feet tall). The sleep was great no tossing, no turning  the hump in the middle of the bed perfectly supports our lumbar. So now today I am going through all our paperwork to find our sales slip and find out the warranty on the mattress to see if there is something that can be done about our bed. It makes me sad that we spend good money on something we thought was going to last us quite sometime and now only four short years latter it is almost unusable.