What's the situation? Was it bitten by a mouse? I woke up in the morning and found fragments of screen windows on the table.

According to the information you provided, this situation is probably that the mouse bit the gauze. Rats are a common pest. They may enter the house and bite all kinds of things, including screen windows. If you find broken screen fragments on the table, it supports the possibility that mice are "criminals"

If you are sure that rats did it, you can consider taking some measures to prevent rats from entering the house again. For example, you can block the gaps in doors and windows to prevent rats from entering from these places; Metal rat-proof nets can be installed to prevent rats from biting screen windows or other items; You can also use tools such as rat poison or mousetrap to catch and kill rats.

Of course, if the screen window is not damaged by rats, it may be caused by other reasons, such as wind blowing and man-made damage. If this is the case, you can consider replacing the screen window or seeking professional help to solve the problem.