Here are the steps to clean a leather couch:

1. Vacuum the couch to remove dirt and debris.
2. Mix a tablespoon of pH-neutral soap in warm water and mix to create suds, or use leather cleaner.
3. Dip a soft cloth into the suds or cleaner and wring it out so it's not dripping.
4. Wipe down the entire couch with the cloth, making sure to get into all crevices.
5. Use a clean, damp cloth to wipe away any soap residue.
6. Dry the couch with a clean towel.

If you have any stains on your leather couch, here are some tips for removing them:

- For ink stains, use rubbing alcohol on a cotton swab and gently rub the stain.
- For grease stains, sprinkle baking soda on the stain and let it sit for several hours before vacuuming it up.
- For water stains, use a hair dryer on low heat to dry out the area.