Over time, wear and tear on the coils of your mattress's box spring can loosen. It's possible that you need a new box spring if your mattress has lost firmness. A new box spring will help make your bed firmer and add some height.
8. Smooth Out Your Bedding
Rumpled up and ill-fitting sheets are uncomfortable. Putting the correct sized sheets on your bed can also help firm it up. Use a sheet that is the same size as your mattress and pull tight from top to bottom and side to side. This will produce pressure on the mattress and make it feel firmer.
9. Add Some Additional Plywood
Many bed frames have plywood slats included. Adding a piece of plywood to your bed frame and mattress can make your mattress firmer. Try placing a piece of plywood between the box spring or bed frame and the mattress. This adds an additional layer of support beneath your mattress, preventing it from sinking.
10. Take Advantage Of The Trial Period
If you recently purchased a mattress and it’s not as firm as you hoped, the quality is lacking, or the mattress isn’t the right fit for you, take advantage of the trial period and return or exchange the mattress.
This will only work if your mattress is still under warranty or in the trial period. Certain warranties might not cover this so double check your warranty or call the manufacturer for more information.
11. Dry Your Mattress In The Sun
If you live in a humid area, your mattress is going to absorb moisture from the air. Excessive moisture can lead to mold and mildew that can damage your mattress and decrease firmness. If you think this might be the problem with your mattress, take your bed and place it in the sun to dry out.
This will not only firm up the mattress, but it will also eliminate any bacteria or germs that may be present. If this does not work, it is best to throw out the mattress. Mold and mildew can lead to infections, allergies, asthma, damage to surfaces, and rotting.
12. Buy A New Mattress
If all else fails, it might be time to buy a new mattress. The support and firmness of your mattress is critical for spinal health and preventing body pain and stiffness–a worn out mattress in general is bad for your health. In the long run, it will be more beneficial to your health and wallet to make the initial investment in a new mattress instead of spending more on firming techniques that might not help