Am I doing something wrong with it? Is there some special technique I haven’t applied? I’ve spent £175 on the corded version, I’ve got it plugged in and while it’s light to use, it doesn’t acrually seem to work. It sucks in dirt and then spits it straight back out again on to the floor. My previous vacuum was a Miele and just gave up the ghost after 10 years. Is there something I’m doing wrong with this shark? I thought they were meant to be amazing!