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Keyboard Switches · Troubleshooting

Keyboard Switch Problems: Stuck Keys, Chattering, and How to Fix Them

Everything you need to know about keyboard switch problems: stuck keys, chattering, and how to fix them, explained plainly.

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How to fix it

Work through these in order, the most common causes come first.

  1. Stuck or Stiff Keys

    Cause 1: Debris in the switch. Crumbs and dust can enter the switch housing through the open bottom and bind the stem. Fix: Remove the switch (hot-swap keyboard) or desolder it.

  2. Key Chattering (Double Registering)

    Cause: Worn or contaminated electrical contacts inside the switch. The thin gold-plated leaf spring inside the switch makes and breaks contact multiple times during a single press when the contacts are worn. Remove the switch, open it with a switch opener, and clean the contact leaf with isopropyl alcohol (90%+) on a cotton swab.

  3. Scratchy Keystroke

    Cause: Unlubed switch with friction between the stem and housing. Fix: Lube the switch using Krytox 205g0 (linear) or Tribosys 3203 (tactile). See How to Lube Keyboard Switches for the process.

Stuck or Stiff Keys

Cause 1: Debris in the switch.

Crumbs and dust can enter the switch housing through the open bottom and bind the stem.

Fix: Remove the switch (hot-swap keyboard) or desolder it.

Use compressed air to clear debris from inside the housing.

If the issue persists, open the switch with a switch opener and physically clean the inside.

Key Chattering (Double Registering)

Cause: Worn or contaminated electrical contacts inside the switch.

The thin gold-plated leaf spring inside the switch makes and breaks contact multiple times during a single press when the contacts are worn.

Remove the switch, open it with a switch opener, and clean the contact leaf with isopropyl alcohol (90%+) on a cotton swab.

Let it dry completely before reassembling.

This resolves contamination-related chattering; it does not fix mechanically worn contacts.

Scratchy Keystroke

Cause: Unlubed switch with friction between the stem and housing.

Fix: Lube the switch using Krytox 205g0 (linear) or Tribosys 3203 (tactile).

See How to Lube Keyboard Switches for the process.

A scratchy feel is normal on budget switches and is resolved entirely by lubing.

How to Lube Keyboard Switches - full lube guide Best Keyboard Switches - replacement options

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Answers

Frequently asked questions

Why does my keyboard key stick after pressing it?

Stuck keys are usually caused by debris (crumbs, dust) inside the switch housing binding the stem, or a stem that is misaligned in the housing after an impact. Remove the switch (hot-swap) or use a switch puller and compressed air to clean it. If the stem is physically damaged, the switch needs replacement.

What is keyboard switch chattering?

Chattering is when a single keypress registers as two or more keystrokes. It is caused by worn or contaminated switch contacts that bounce, making and breaking the electrical connection multiple times during what should be a single press. Cleaning the contacts sometimes resolves it; switch replacement is the reliable fix.

Can I fix a broken switch without desoldering?

On a hot-swap keyboard, yes, pull out the broken switch and insert a replacement. On a soldered keyboard, you need to desolder the old switch (requiring a soldering iron and desoldering pump or wick) before installing a replacement. This is a repair most people find worthwhile to learn but can take 15-30 minutes per switch for a beginner.

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