You can test your webcam online or using programs that come with Windows 10 or your Mac. You don't have to wait for a video call to find out there's a problem with your webcam - test it ahead of time.

As explained earlier, the primary cause of blurry pictures or videos by a webcam is the dirty camera lens. If the lens of your webcam is dirty, clean it with a soft lint-free cloth. This will fix the ...