Basic Checks:

• Restart: Reboot your device. This re-initializes everything and might just solve the glitch.
• Connection: For wired keyboards, ensure it's firmly plugged in. Try different ports or a different computer. For wireless, check batteries and connection strength.
• Cleanliness: Gently shake the keyboard upside down (off and unplugged!) to dislodge crumbs. Use compressed air and a soft cloth to clean between keys.

Software Tweaks:

• Drivers: Outdated or faulty keyboard drivers can cause problems. Update or reinstall them through your device manager.
• Settings: Look for special keyboard settings like sticky keys or filter keys. Disable them if accidentally enabled.
• Troubleshoot: Most operating systems have built-in keyboard troubleshooters. Run them to diagnose and potentially fix the issue.

Advanced Fixes:

• On-screen Keyboard: Most devices have an on-screen keyboard as a temporary backup. Look for it in your accessibility settings.
• External Keyboard: Borrow a friend's keyboard to confirm if it's a hardware issue with your own.
• Professional Help: If none of the above works, it might be time to visit a technician or contact your device manufacturer for further assistance.