Bathing a cat can be a stressful experience for both the cat and the owner, but with some preparation and patience, it can be done successfully. Here are some tips to help make the process as stress-free as possible for your American Shorthair:

1. Choose the right time: Try to bathe your cat when they are in a calm and relaxed state, such as after a nap or a play session. Avoid bathing your cat when they are already stressed or upset.
2. Gather the right materials: You will need a cat-specific shampoo, a cup or jug for pouring water, a towel, and a non-slip surface for the cat to stand on, such as a rubber mat.
3. Make the environment comfortable: Fill the bathroom with familiar scents and items, such as a blanket or a toy, to help your cat feel at ease. Make sure the room is warm and draft-free, as cats do not like sudden changes in temperature.
4. Gradually acclimate your cat to the process: Before the actual bath, give your cat some positive associations with the bathroom by playing with them there, offering treats, and talking to them in a calming tone.
5. Start with the head: When you are ready to begin the bath, start by wetting the head and neck. Be gentle and avoid getting water in their ears. This will help to prevent panic and protect their sensitive hearing.
6. Use a gentle shampoo: Lather the shampoo on your hands and then gently massage it into your cat’s fur, being careful to avoid their eyes, nose, and mouth. Rinse the shampoo thoroughly with warm water.
7. Be patient: Some cats may struggle or become agitated during the bath. It’s important to remain calm and not react harshly. If your cat becomes too stressed, stop the bath and try again another time.
8. Dry your cat thoroughly: After the bath, wrap your cat in a warm, fluffy towel and gently rub them dry. You can also use a hair dryer set on a low, warm setting to help speed up the drying process.

By following these steps and being patient and gentle, you can help make bathing your American Shorthair a less stressful experience. However, if your cat continues to become extremely distressed, it may be best to seek the assistance of a professional groomer.