The answer to 'why is my cricket scratching sounds' is that crickets make this noise as a form of communication. Crickets rub their wings together to produce a chirping or scratching sound, which serves several purposes such as attracting mates, defending territory, and communicating with other crickets. This behavior is normal and not a sign of a problem.
The scratching sounds you're hearing are likely coming from crickets that have made their way into your home. Crickets are attracted to warm, dark, and moist environments, and they may enter homes through cracks and crevices in search of shelter and food. While their presence can be annoying, crickets are generally harmless to humans and do not cause structural damage.