I'm guessing his carpets are > 33% cleaner than your's. We bought a Eureka about 4 years ago and we "thought" our carpets were clean too. That is, until the Dyson showed how much it pwned the Eureka. It was unbelievable how much crud was still in our carpets after all these years of using the Eureka. She had to empty the canister several times during the 1st use of the Dyson; and she normally vacuumed 2-3 times a week, so we were amazed at how much crud was still there.