Stop Filing Your Nails Like This: Avoid These 3 Mistakes

File the nails the right way—or risk splitting, peeling, and long-term damage. Many don’t realize that using the wrong nail file for under nail care can weaken your tips instead of refining them. Whether you’re shaping, smoothing, or detailing, these common mistakes sabotage your manicure goals. Curious which habits are secretly ruining your nails?

⏱ 7 min read

💡 File the nails with pro precision — see the KentDO difference

Why Does Filing the Nails Matter?

Filing your nails isn’t just about shape—it's about health, strength, and style. When done correctly, it can prevent snags, breaks, and peeling. But poor technique? That leads to weak, frayed, and uneven nails that undo your entire manicure.

Which style suits you best? Read on!

How to File the Nails Correctly

To file the nails the right way, use a fine-grit file and move in one direction only. Avoid using excessive pressure, and never file nails when they’re wet. Filing regularly can help maintain shape and prevent painful splits.

1. Choose a file that suits your nail type (glass or stainless steel for durability).
2. Hold the file at a slight angle under the nail edge.
3. File in one direction—start from side to center.
4. Smooth the edge with light strokes to seal the keratin layers.

Mistake #1: Filing Back and Forth

We’ve all done it—zipping the file back and forth like a saw. But this friction tears the nail layers, causing splits and ragged tips. This mistake is one of the fastest ways to weaken your nail structure.

Mistake #2: Using the Wrong Nail File for Under Nail

The underside of your nails needs gentle care. Using a harsh or bulky file under the nail can cause lifting, thinning, and painful edges. For under-nail shaping, precision is key—enter the KentDO Stainless Steel Nail File Set.

• ✅ Thin tip reaches tight spaces
• ✅ Doesn’t scratch the nail bed
• ✅ Perfect for almond, oval, and stiletto shapes
• ✅ Durable and easy to sanitize

💡 Use a nail file for under nail detailing — no more harsh scrapes!

Mistake #3: Filing When Nails Are Wet

Wet nails = weak nails. Filing right after a shower or soak makes the nail plate too soft, increasing the chance of tears and uneven edges. Always wait until nails are fully dry before you file.

Tip: If you're using nail care tools right after washing, pat dry and wait 10 minutes first.

Pro Tips for Smoother, Healthier Nails

Want salon-smooth nails at home? Follow these expert-backed tips:

• Use a professional-grade file that suits your nail thickness.
• Round off corners slightly to prevent snagging.
• Buff lightly once a week to reduce surface roughness.
• Keep your file clean to prevent bacteria buildup.
• Finish with nourishing oil or cuticle serum to lock in strength.

💡 File the nails safely and precisely — discover the KentDO experience

Mini FAQ

How often should I file my nails?

Every 7–10 days is ideal to maintain shape and prevent breakage. Avoid over-filing, especially if your nails are brittle.

Can I use the same file for shaping and under-nail cleaning?

Only if it’s designed for both. The KentDO set includes multiple sizes, making it safe for under-nail detailing and edge refining.

Which direction should I file my nails?

Always file in one direction—from side to center. Avoid back-and-forth motions that fray the nail layers.

Why are my nails splitting after filing?

Likely causes include filing wet nails, using a rough file, or applying too much pressure. Switch to a finer grit and adjust your technique.

Where can I find a high-quality nail file for under nail care?

Visit the Nail Care Devices collection to explore expert-approved tools.