Symptoms
- Gaps appear in an otherwise even stitch line
- Stitches skip mostly on stretchy or slippery fabric
- Problem is worse at the start of a seam
- Bobbin thread doesn't catch consistently
Likely causes
- CommonDull, bent, or wrong-type needleA worn or mismatched needle (for example, a sharp needle on knit fabric) can miss the loop that forms each stitch.
- CommonNeedle inserted backwards or not fully seatedThe flat side of the needle must face the correct way for the hook mechanism to catch the thread.
- PossibleIncorrect thread tensionToo loose a top tension can prevent a clean loop from forming at the right moment.
- PossibleFabric not feeding evenly (stretch or slippery material)Stretchy or slick fabrics can shift slightly as the needle enters, causing missed stitches.
- PossibleLint buildup around the hook mechanismDebris under the needle plate can interfere with the needle-hook timing.
What to do
- Replace the needle with a new one appropriate for the fabric (a ballpoint or stretch needle for knits, a universal or sharp for wovens).
- Double-check the needle is inserted all the way up with the flat side oriented correctly.
- Rethread the top of the machine completely, making sure it seats in the tension discs.
- Clean lint from under the needle plate and around the bobbin hook with a small brush.
- For stretchy or slippery fabric, use a walking foot or stabilizer to help it feed evenly.
- Slow down your sewing speed on tricky fabric, since skipping is often worse at high speed.
- Test on a scrap of the actual fabric before returning to your project.
Tools and parts
- Small lint brush
- Screwdriver (small, machine-specific)
Ballpoint or stretch needleSearch: “sewing machine stretch needle”
When to call a pro
If skipping continues after a new needle and clean threading, a technician can check hook timing, which is a common cause but not a user adjustment.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.