Published July 20, 2026 · Reviewed by the Unbiased Advice & Insights editorial team · How we research and score
A wobbly crib is often caused by loose screws, an uneven floor, or assembly errors. Tighten all hardware, level the crib with shims, and recheck assembly. If the crib has cracked wood or stripped screws, replace it immediately.
Why Does a Crib Become Wobbly?
Our editorial team compared specifications, buyer feedback and key decision factors to identify the most common reasons a crib loses its stability. A wobbly crib is not just annoying; it can be dangerous if left unchecked. Here are the primary causes:
- Loose screws and bolts: Over time, the hardware that holds the crib together can loosen due to normal use or if it was not fully tightened during assembly. This is the most frequent cause of wobbling.
- Uneven floor: If the crib is placed on a carpet, rug, or an old hardwood floor that is not level, the crib may rock or wobble. Even a small slope can cause instability.
- Assembly errors: Missing a step, using the wrong screws, or not aligning parts correctly can result in a structurally unsound crib. Some cribs have specific torque requirements for bolts.
- Worn or damaged parts: Plastic cam locks can strip, wooden dowels can crack, and metal brackets can bend. These issues often appear after a crib has been disassembled and reassembled.
- Incorrect mattress support position: Some cribs have adjustable mattress heights. If the support brackets are not fully engaged or are installed upside down, the mattress platform may be unstable, making the whole crib feel wobbly.
How to Fix a Wobbly Crib: Step by Step
Before you panic, follow these steps to diagnose and fix the issue. Always ensure the crib is empty and the baby is safely elsewhere during inspection and repair.
- Remove the mattress and bedding. This gives you full access to the crib frame and hardware. Set the mattress aside in a safe place.
- Check all screws and bolts. Using the correct screwdriver or Allen wrench (often included with the crib), tighten every visible fastener. Pay special attention to corner brackets, the mattress support, and the side rails. Do not overtighten, as this can strip the wood or plastic.
- Inspect for missing or broken hardware. Look for stripped screw holes, cracked plastic cam locks, or bent metal brackets. If you find any damaged parts, contact the manufacturer for replacements. Do not substitute with hardware from a hardware store unless you are certain it matches the specifications.
- Level the crib on the floor. Place a carpenter's level on the top rail and then on the floor next to the crib. If the floor is uneven, use furniture shims under the crib legs. You can also use folded cardboard or thin pieces of wood. Adjust until the crib is stable and does not rock.
- Verify assembly instructions. Review the manual to ensure all parts are correctly oriented and assembled. Some common mistakes: using the wrong screw length, forgetting a washer, or not fully seating a cam lock. Disassemble and reassemble if needed.
- Test the crib for movement. After tightening and leveling, gently push the crib from different sides. It should not wobble, rock, or creak. If it still moves, recheck each step. If the problem persists, the crib may have a structural defect.
When to Replace the Crib Instead of Repairing
Some wobbles cannot be fixed safely. Replace the crib immediately if you notice any of the following:
- Cracked or split wood: Any crack in the frame, slats, or mattress support compromises the crib's strength. Wood glue and clamps are not sufficient for a load-bearing crib.
- Stripped screw holes that cannot be repaired: If the wood no longer grips the screw, the joint will never be tight. Some cribs offer repair kits, but if the damage is extensive, replacement is safer.
- Bent or broken metal parts: Metal brackets that hold the crib together can bend under stress. Once bent, they cannot be straightened reliably.
- Missing or damaged safety hardware: If the crib uses proprietary cam locks or bolts that are no longer available from the manufacturer, it is safer to buy a new crib.
- The crib is older than 10 years or has been recalled: Older cribs may not meet current safety standards. Check the CPSC website for recalls. If the crib is a drop-side model made before 2011, replace it immediately.
Remember, a crib is one of the most important safety items for your baby. When in doubt, err on the side of caution and invest in a new crib that meets current ASTM and CPSC standards. Your baby's safety is worth more than the cost of a replacement.
More guides
See our full buying guides hub and our research and scoring methodology. We compared specifications and verified owner feedback; we did not physically test every product.