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I was sewing a stretchy knit top a while back when the machine started skipping stitches every few inches. Right away I checked the obvious stuff. Nothing worked, so I checked it all over again. Finally I realized I’d never swapped out the universal needle from my last project. A five-minute needle change fixed the whole thing. That’s how most skipped-stitch problems go. They’re annoying, a little mysterious in the moment, and almost always simple once you know where to look. The trick is knowing what order to check things in, instead of randomly swapping parts and hoping.

What’s Actually Happening When a Machine Skips Stitches

A stitch forms when the needle goes down. The hook inside the machine catches the loop of thread behind the needle’s eye, and the two threads interlock. A skipped stitch means that catch didn’t happen. Something got the timing or the mechanics of that moment just slightly off, so the thread passed through without locking. Once you think of it that way, most of the causes below make more sense.

Start With the Needle

The needle causes more skipped stitches than anything else. It’s also the cheapest, easiest thing to rule out. A bent needle, a dull one, or the wrong type for your fabric can all be the cause. Any of them can throw off that hook-and-loop timing just enough to skip a stitch. I go through the different needle types and when to swap them in Sewing Machine Needles Explained. If you’re not sure what’s causing a skip, start there. Put in a fresh needle that matches your fabric before you troubleshoot anything else.

Check How the Machine Is Threaded

A machine that’s threaded even slightly wrong will often skip stitches instead of jamming outright. So will a bobbin that’s not seated correctly. Rethread the top thread from scratch, including running it back through the tension disks, not just re-tracing the visible path. Then take the bobbin out and reinsert it. Make sure it sits in its case and pulls thread the direction your manual shows. It sounds too simple to be the fix. But it’s one of the most common fixes. It matters even more if you switched thread or fabric partway through a project and didn’t rethread from the top.

Tension Problems Can Look Like Skipped Stitches

Tension that’s badly off can produce loose, uneven stitches. They can look a lot like skipping, even when the machine is technically catching every stitch. I covered my own tension troubleshooting in Sewing Machine Tension Problems, and it’s worth ruling out here too. A quick test line on scrap fabric will usually tell you which one you’re dealing with. Is it a true skip, or just a tension issue wearing a skip’s disguise?

The Fabric Itself Can Be the Problem

Slippery, stretchy, or lightweight fabric can shift right when the hook needs to catch the loop. That alone can cause a skip, even with a good needle and correct tension. Knits especially need a ballpoint or stretch needle instead of a standard sharp one. A sharp point can push the fabric down instead of piercing it cleanly. For anything slippery or unstable, a stabilizer under the fabric while you sew makes a real difference. I like Sulky’s Soft ‘n Sheer stabilizer for this. It tears away cleanly afterward and doesn’t leave the fabric feeling stiff.

Lint and Bobbin Case Buildup

A dirty bobbin case is one of the sneakiest causes of skipped stitches. It looks fine at a glance but throws off the hook’s timing just enough to cause problems. Lint and bits of dried thread build up around the bobbin and feed dogs faster than you’d expect. That’s especially true if you sew a lot of fleece, flannel, or cotton. I walked through my full cleaning routine in How to Clean Your Sewing Machine at Home. If it’s been a while since you cleaned out the bobbin area, that’s worth checking first. Random skips with no clear pattern are often the giveaway.

When Skipped Stitches Mean a Timing Problem

Sometimes you’ve replaced the needle, rethreaded everything, checked tension, and switched fabric or stabilizer, and the skipping keeps happening anyway. When that happens, the machine’s internal timing may actually be off. That means the hook and needle aren’t meeting at the right moment anymore. It’s usually from wear, or a jolt to the machine at some point. This isn’t something to fix at home. I go into the signs that mean it’s time to call a technician in How to Maintain Your Sewing Machine at Home. A persistent timing-related skip belongs on that list. One thing worth noting: timing problems are more common on machines that get dropped, shipped, or moved around a lot. If your machine recently took a hit, or a bumpy trip in the car, that’s a reasonable first guess. Rule that out before you assume it’s something else.

A Troubleshooting Order for Skipped Stitches

When a machine starts skipping, work through this in order rather than guessing randomly. Start with a fresh needle matched to your fabric. Then rethread and reseat the bobbin. Run a tension test on scrap fabric. Clean out the bobbin case if it’s been a while, and try a stabilizer if the fabric itself is slippery or stretchy. Each step takes a few minutes and rules out one whole category of cause. That’s a lot faster than randomly swapping things and hoping. If you’ve gone through all of that and it’s still skipping the same way every time, stop troubleshooting. That’s your sign to call someone instead of guessing further.

One Last Thing

Skipped stitches feel like a bigger problem than they usually are, mostly because the fix is rarely obvious in the moment. Work through the list in order, starting cheap and easy before assuming the worst. Most of the time you’ll be back to sewing in a few minutes. And you’ll know exactly what to check first the next time it happens.