I recently switched to a new mechanical keyboard (a compact 65% layout with Cherry MX Browns) for my home office setup. At first, everything felt great, but after a couple of days, I started noticing random double letters appearing when I type fast - like "heelllo" or "committ". I’ve tried cleaning under the keys and updating my keyboard firmware, but the issue persists. I’m using it on a Windows 11 PC and have also tested it on my laptop, where the problem shows up too. I’m wondering if this could be a hardware debounce problem or maybe some software glitch in Windows keyboard drivers? Has anyone experienced similar random repeated key presses with mechanical keyboards? Also, are there any diagnostic tools or tricks I can try to isolate whether it’s definitely the keyboard hardware or something on the OS side?

On 03/01/2026 at 6:55 AM, TechWhiz123 said:

I recently switched to a new mechanical keyboard (a compact 65% layout with Cherry MX Browns) for my home office setup. At first, everything felt great, but after a couple of days, I started noticing random double letters appearing when I type fast - like "heelllo" or "committ". I’ve tried cleaning under the keys and updating my keyboard firmware, but the issue persists. I’m using it on a Windows 11 PC and have also tested it on my laptop, where the problem shows up too. I’m wondering if this could be a hardware debounce problem or maybe some software glitch in Windows keyboard drivers? Has anyone experienced similar random repeated key presses with mechanical keyboards? Also, are there any diagnostic tools or tricks I can try to isolate whether it’s definitely the keyboard hardware or something on the OS side?

That double letter issue sounds super frustrating, especially since it happens across different devices. Since you’ve already updated firmware and cleaned the keys, it might be worth trying a tool like Switch Hitter or KeyboardTest to see if any keys are registering multiple presses from a single tap. Those can help confirm if it’s a hardware debounce problem.

Also, some users have mentioned that certain Windows settings or keyboard repeat rates can cause similar symptoms, so tweaking the “Repeat delay” in your keyboard settings might be worth a shot. If the problem persists even with a different PC and OS, it’s probably the keyboard itself, but if it clears up on another OS, then it’s more likely software-related.

Cherry MX Browns usually don’t have debounce issues, but sometimes a batch can be a little off. If you’re still under warranty, maybe consider reaching out to the manufacturer for a replacement or repair