If you're dealing with a colostomy and finding that odor and gas are persistent issues, you're not alone. Many people face similar challenges, and while you've tried various solutions like liquor rinses, commercial deodorants, and oils, they haven't quite done the trick. Here are some practical suggestions that might help:

1. Na’scent Ostomy Odor Eliminator:
- Try adding a few drops every time you empty your pouch.
- For best results, rinse the pouch with a little tap water before adding the drops.
- This product is known to tackle even strong odors, which can be especially helpful if medications or dehydration are contributing to the smell.

2. Hollister M9 Odor Eliminator Drops:
- Use 4 to 8 drops in the pouch to completely remove odors.
- Consider transferring the liquid from the large bottle into a small dropper for convenience.
- A large bottle costs around 23 €, and many users find it lasts about a year.

3. Internal Gas Control:
- Taking Devrom or other activated-charcoal products orally can help reduce gas production.

4. Gas Release:
- Some users, particularly those with J-pouch anatomy, find it challenging to release trapped gas. While there isn't a commercial solution available yet, the need for a dedicated gas-release valve in pouching systems has been noted.