I understand that. That's what made me want to try one again. I knew they were sealed now where they weren't before. They improved several areas. It's the bag collar. Keep in mind, I had three, yes three Kenmore canisters from around 2004 to 2010. Each lasted around 2 years when the quick connect connections would start failing. I'm a clean freak so I vacuum more than most ppl. At least a few times per week. There was always dust in the bag chamber which annoyed me the most. Even in this video I linked, you can clearly see he's just unboxed the vacuum and it's a genuine bag that came with it and after his mess test, bag chamber FULL of dust. I'm not sure what you're doing differently. I had one instance where I changed a bag, (I was always careful) slid the genuine bag onto the collar, vacuumed for weeks. Went to check the bag and the bag had slid 1/2 off the collar. I was unknowingly vacuuming basically without a bag for weeks. After that, I started taping the bag onto the collar out of paranoia.