Why does my mouse double click on its own?

Almost always a worn switch contact. The metal leaf inside the switch springs back too slowly and bounces, which the computer reads as a second click. Cleaning with contact cleaner helps for a while; a switch replacement fixes it permanently. Some models are known for this failure. It is wear, not something you did.

Is the double-click bug covered by warranty?

Often yes. Several manufacturers have extended warranty coverage on popular models precisely because of this defect, and unintended double clicks are a documented, reproducible fault. A saved test result showing repeated suspicious gaps on one button makes the support conversation short.

Can I fix the double-click bug without soldering?

Only on mice with socketed switches, which are a minority. On most mice the switch is soldered to the PCB, so the realistic no-solder options are a warranty replacement or a repair shop. Contact cleaner dripped into the button can buy weeks to months on a mildly worn switch.

Why is my polling rate estimate lower than the box says?

Browsers deliver pointer events throttled through the display refresh cycle, so even a 1000 Hz mouse often reads 120–250 Hz here. The number is useful for spotting a mouse that has stopped responding properly, not for verifying the marketing spec.

How to Test Your Mouse for the Double-Click Bug

One click that becomes two. In games it fires when you aim; in file managers it opens what you meant to select. The fault lives in a switch that costs less than a coffee, and three minutes of testing tells you which button is failing and what to do about it.

Not sure which device is at fault? Start with the input device fault diagnosis hub: it maps symptoms to the right test, then to repair, replace or return.

What you need

A desktop browser and the mouse. Wired or wireless both work; if the mouse is wireless and you can plug it in, do the test wired first. A dying battery or a flaky receiver can imitate occasional double clicks, and you want the cleanest signal for the verdict.

Step 1 — Give each button twenty honest clicks

Open the free mouse double-click test and click the left button twenty to thirty times at a normal pace, the way you actually click in daily use. Then switch to the right button and repeat. Do not try to double-click on purpose. The test listens for two events closer than 100 ms, and no healthy button produces that gap by accident.

Step 2 — Read the gaps, not just the count

The event list shows the milliseconds between every press pair. Gaps of 5–30 ms are classic contact bounce: the switch fired twice from one press. Gaps of 30–100 ms that repeat on the same button mean a worn contact even if the count looks small. The verdict card does this math for you, but the raw gaps are worth a glance; they separate a dying switch from a one-off interference spike.

Step 3 — Rule out the software suspects

If the test is clean but your mouse still double clicks in games, the fault is software: uninstall or disable driver utilities and macro tools, reset click settings to defaults, and test the mouse on another computer. Hardware double clicks show up in the tester because the browser receives whatever the switch sends, with no layer in between to invent clicks.

Step 4 — Decide: clean, claim, or swap

For a mildly worn switch, contact cleaner dripped into the button housing often buys weeks to months. Work the button and let it dry, then rerun the test. Check the warranty before opening anything: unintended double clicks are a documented, reproducible fault on several popular models, and your saved test result is the evidence. Out of warranty, a switch swap is the permanent fix; most mice need soldering, though the parts cost pocket change. After any repair, rerun the double-click test and confirm zero suspicious gaps before you close it up.