To be honest, I find the whole supermarket car-wash thing is becoming a bit of a nuisance. I get accosted every time I visit our local Sainsbury's, and I find their manner quite aggressive. Each time the conversation goes something like this:
"Car wash, Sir?"
"No thank you".
"We're very good".
"I'm sure you are, but still no thank you".
"Cars need washing in this weather, Sir" (by now he is shouting after me as I have almost made it into the store.)
I'm sure this must be putting some people off going to Sainsbury's