A squeaking noise coming from your box spring is often not caused by the internal workings of the box spring itself. The noise is usually created by the spring interacting with the bed frame. To fix it, you merely need to provide padding or grease to the area where the metal is rubbing awkwardly.
Step 1 - Locate the Noise
Have your helper get onto the bed to create the squeak. A person is ideal since you can have them move as needed, but if you live with just a pet, they can still be of help. Listen carefully while the individual moves about on the bed. Once you get a feel for where the noise is coming from, look under the bed or along the side where the box spring connects with the bed frame. You must find the place where either metal is meeting metal or where the wooden bed frame is shifting against the box spring. Also, many box springs have metal-tipped corners or edges to increase durability and if these areas interact with a metal bed frame, they squeak.
Step 2 – Pad the Bed Frame
Using towels or old t-shirts, pad the area between the box spring and the frame, as well as around the bed frame joints. Some people with wooden framed beds have had success propping pillows between the bed frame and the wall so that the frame cannot shift back and forth laterally.
Step 3 – Grease Joints
If the joints of the metal bed frame are causing the squeak, loosen the bolts and liberally apply WD-40. When screwing them back together, apply firm force, but take care not to strip the bolt.
Children jumping on the bed or frequent movement can cause the bolts to loosen and the frame to wobble and grate as you shift in your sleep. Thus, this method is only a temporary solution. You might need to reapply the oil and tighten the bolts every three to four months as needed.
Step 4 – Use a Plywood Buffer
If the box spring has been padded and the bed frame greased but the noise persists, provide a buffer between the mattress and the box spring. Purchase a sheet of plywood to fit the size of the bed frame. Most large home improvement stores will cut boards for no extra charge if you provide them the dimensions.
Place the plywood between the mattress and the box spring. Doing so will make your bed only a tiny bit firmer, but it will buffer any movement you make during the night. Since the major role of the box spring is to support the mattress within the bed frame, the plywood won't hinder it, but it will make your sleep much quieter.