How to Fix Keyboard Chatter

Keyboard chatter — also called double typing — is when a single keypress registers two or more times (“hello” becomes “helllo”). It is almost always a switch problem: dust or debris under the contacts, or a switch that has worn and is “bouncing” so the keyboard reads one press as several. The good news is it is usually fixable without a new keyboard. Work up the ladder: identify the culprit key, blow out and clean the switch, try increasing the debounce time in the keyboard's software if it has any, and — on a hot-swappable board — simply replace that one switch. Only a keyboard with no serviceable switches and no software fix needs replacing.

What causes chatter

Mechanical switches register a press when two metal contacts touch. Keyboards use a short “debounce” window to ignore the tiny electrical bounce as the contacts settle. Chatter happens when a switch bounces more than that window allows — because dust or grime is interfering with the contacts, or the switch has aged and its contacts no longer settle cleanly. Either way the keyboard sees a single physical press as multiple inputs. Our keyboard switch types guide explains how the contacts work.

Step 1: confirm which key and that it is chatter

Use an online key tester or a text field to find the exact key that double-registers and how often. Confirm it is chatter (one press, two characters) rather than a sticky key(a key that physically hangs) — they feel different and have different fixes. Knowing the specific switch tells you where to focus.

Step 2: clean the switch

Dust and debris are the most common cause, so clean before anything drastic:

• Power down, and blow out around the key with compressed air — often that alone clears the debris causing the bounce.
• A small amount of contact cleaner made for electronics can be worked into the switch on some designs; let it fully dry before use.
• Our how to clean a mechanical keyboard guide covers keycap removal and safe cleaning in detail.

Step 3: increase debounce in software

Some gaming keyboards let you raise the debounce time in their configuration software. A slightly longer debounce window tells the keyboard to ignore the extra bounces, which can mask chatter from a marginally worn switch. It is a legitimate fix, though a very high debounce can add a hint of latency, so raise it only as much as needed. Not every board offers this. RTINGS' keyboard reviews note which models have configurable debounce and onboard software.

Step 4: replace the switch

If cleaning and debounce do not fix it, the switch itself is worn. On a hot-swappable keyboardthis is a two-minute, few-cents fix: pull the keycap, pull the switch with a puller, and press in a fresh one — no soldering. This is one of the best reasons to own a hot-swap board; see our best hot-swappable keyboardsroundup. On a soldered board, replacing a switch means desoldering, which is doable but involved. If the board is cheap, old, and not serviceable, it may be time for a new one — our best mechanical keyboards and best gaming keyboards under $100 roundups are where to look.