How to fix a mouse that double clicks

Why mice start double clicking

Under each mouse button is a small switch with metal contacts. When you press it, the contacts should close once. As the switch wears, or as dirt and oxidation build up, the contacts bounce and close twice in a few milliseconds, so the computer sees two clicks. This is called switch chatter, and it's the most common fault on mice that are a few years old.

Should reach the computer as one click

1 press

Windows' default double-click time

500 ms

Slow test clicks per button to confirm it

20–30

Step 1: Confirm it's the mouse

Open the double click test and click the left button slowly, about once a second, twenty or thirty times. If it ever reports a double click while you're single-clicking, the switch is chattering. Repeat with the right button.

To be sure it's the mouse and not the computer, plug the mouse into another computer, or another mouse into this one, and test again.

Step 2: Check the double-click speed

If the double-click speed is set very slow, two separate clicks can be read as one double click. On Windows 11, open Settings > Bluetooth & devices > Mouse > Additional mouse settings and move the Double-click speed slider towards Fast. On a Mac, open System Settings > Accessibility > Pointer Control and adjust Double-click speed.

Windows treats two clicks as a double click when the second arrives within the double-click time, 500 ms by default. If the test still flags double clicks with clicks a full second apart, twice that, the setting isn't the cause.

Step 3: Clean the switch

1. Unplug the mouse or switch it off and take out the battery.
2. Blow short bursts of compressed air into the gap around the faulty button.
3. Click the button firmly twenty or thirty times to help clear the contacts.
4. Plug it back in and run the double click test again.

Cleaning helps when dirt is the cause. When the contacts themselves are worn, the fault usually comes back.

Step 4: Use a debounce setting

Some gaming mouse software has a debounce time setting, which ignores a second click that arrives within a few milliseconds of the first. Raising it can hide mild chatter. Check your mouse maker's software for the option and update the mouse firmware while you're there.

Step 5: Warranty, repair or replace

Double clicking is a known fault, and many manufacturers replace mice under warranty for it, so check your warranty first. Out of warranty, the switch can be replaced, which needs desoldering the old one. On a cheap mouse, replacing the whole mouse is usually simpler. Whatever you choose, run the mouse test afterwards to check every button.