@dona46 I had a similar experience with the Coloplast filters. They get clogged. If you are using a 2 piece appliance you could change the bag, but not the wafer, after the filter gets clogged.

Some other foods on the "gas producing" list are:

Alcohol, Beans, Broccoli, Brussel sprouts, Cabbage, Carbonated beverages, Cauliflower, Chewing gum, Cucumber, Dairy products, Eggs, Onions, Peas.

I'm not sure how you can identify when you swallow air, either. Particularly if you do it in your sleep.

Have you tried anything like Gas-X or Beano?