Is flushing the aircon system to 'kill bacteria' just a sales ploy?

I was advised that the aircon in my wife's DS3 would need to be flushed to kill the bacteria in the system. Is this a sales ploy? The car had a pollen filter.

What should I replace my Renault Twingo with?

I have had my RenaultSport Twingo for five years and am looking at replacing it after 94,000 miles. It has always been a big enough car for me, but I'm looking for something nearly new that is small and...