Use One Genius Affordable Hack To Fix Your Sagging Mattress
By V BAWA
If some parts of the mattress sag, especially with a new mattress, the problem might be the bed frame, and you can fix this by adding some extra support underneath the mattress.
Some mattresses sag in the middle, as their bed frames only have legs on the corners, in which case, add some support in the middle, like an old piece of plywood or a wooden board.