Why do they think you were crap if the same person was asking you back time and time again? I am not disputing what you've said, I am questioning the logic of the people who think this makes you crap. Surely if you were doing a bad job you'd not get asked back at all.
If I saw a carpet cleaner at a house on a regular basis, I'd make the assumption that either the houseowner was fussy or that the carpet cleaner was doing different rooms.
I wouldn't even think that the owners were well riffy, because my own experience is that riffy people dont have their carpets cleaned. Then again, I'm not one for watching the neighbours. It worries me when I hear about people who do, I worry that my neighbours are watching me