This topic is about dealing with a persistent odor issue when using a Hollister two-piece colostomy pouch with an integrated filter. The person experiencing this problem has tried various in-pouch deodorants without success and is seeking advice on how to eliminate the odor.

Here are some helpful suggestions and insights:

1. **Check for Micro-Leaks or Poor Fit:**
- Consider having your stoma re-measured. Adjust the barrier opening to be slightly larger or match the exact shape of your stoma to ensure a flat and secure seal.
- Even a tiny seepage under the barrier ring can cause odor, even if no visible leak is present.

2. **Filter Issues:**
- Integrated filters often fail once they become wet or clogged. They may not be effective after initial use.
- If the filter gets damp, cover it with tape to block the odor until you can change the pouch.
- Some people prefer to avoid filtered pouches and manually vent gas instead.

3. **Alternative Pouches and Brands:**
- Consider trying different pouches or brands that others have found effective in controlling odor or providing better security, such as:
- Coloplast two-piece system
- SALTS BE Confidence pouch (UK brand)
- Dansac Nova Easifold (owned by Hollister)
- OAKMED pouches (UK)
- Hollister 59902 urostomy pouch, known for strong adhesion when used with Coloplast brava tape extenders

4. **Odor-Control Drops and Deodorants:**
- Some products that members find effective include:
- M-49 drops
- Na-Scent liquid deodorizer
- Hollister M9 drops (affordable in the USA, pricier in the UK)

5. **Practical Odor-Reduction Habits:**
- Keep the outlet spotlessly clean after emptying by using toilet paper followed by a flushable wet wipe.
- If your pouch balloons, vent gas through the outlet in a well-ventilated area, like a garage or outdoors, to prevent bathroom odor.
- Using bag liners and thoroughly rinsing with a squeeze bottle can help minimize residue inside the pouch.