Remove the headboard and footboard if present by unscrewing any bolts, nuts or screws.
Take the bed apart by removing the mattress and the box spring.
Remove the fabric that is under the box spring so that you can get a look underneath. Usually, staples or small nails hold this fabric in place. Gently lift them up so that you can replace the fabric when you are done. It is not mandatory to replace the fabric.
Examine the springs in the box spring. Tighten any loose screws or bolts and the connectors that are holding the springs in place.
Add plastic washers to all of the screws and bolts.
Spray some cooking spray or lubricating spray onto the springs generously.
Flip the mattress over both horizontally and vertically.
Reassemble the bed by making sure that the mattress is centered. Off-centered mattresses and box springs can cause unwanted squeaks.