Here are some ways to stop your neighbor's cat from visiting your home without leaving any traces: 1. **Find out what attracts cats and eliminate it**: - **Food scraps**: Thoroughly clean up food scraps on the floor and in corners of your home, including areas such as the kitchen and dining room. Clean regularly to make sure nothing is left behind. Do not feed stray cats outdoors at will to avoid attracting more cats. - **Open doors and windows**: Check if there are gaps or loose doors and windows in your home, through which cats may enter. Install screens or sealing strips to prevent cats from getting in. - **Suitable habitat**: Put away soft, warm and hidden items in your home, such as unused cardboard boxes, piles of clothes, etc., which are easy to attract cats to live. Tidy up the garden or balcony to avoid too much debris piling up to form a hiding place for cats. 2. **Set up physical barriers**: - **Install screens**: Install screens on windows to prevent cats from entering the room. Choose fine screens to prevent cats from getting in through the gaps. - **Use door stops**: Install door stops at the bottom of the door to prevent cats from pushing the door open and entering the house. - **Arrange fences**: If you have a garden or balcony, you can install fences to restrict cats from entering. The height of the fence should be sufficient, generally more than 1.2 meters is recommended, and the gap between the fences should be small to prevent cats from drilling through. 3. **Create an environment that makes cats uncomfortable**: - **Place citrus items**: Cats don’t like the smell of citrus. You can place orange peels, lemon peels, etc. at the door, window sills, and other places where cats may enter. But change them regularly to keep the smell fresh. - **Use smells that cats don’t like**: Such as white vinegar, wind oil, etc., dilute them and spray them at the door, around the windows, and places where cats often appear. But be careful not to use too strong smells to avoid discomfort to the human body. - **Make sounds that scare cats**: You can buy a cat repellent. When a cat approaches, it will emit a high-frequency sound to make the cat feel uncomfortable and leave. But be careful not to affect the neighbors. 4. **Communicate with neighbors**: - **Friendly communication**: Communicate with neighbors politely, inform them that cats often come to your house, and ask if you can strengthen the management of cats, such as closing doors and windows or putting collars and bells on cats so that you can find and alert neighbors in time. - **Propose joint solutions**: Discuss with neighbors how to solve the problem of cats running around, such as suggesting that neighbors provide cats with enough toys and activity space, or consider sterilizing cats to reduce their desire to go out.