We've organised to have our cars washed at our office on a monthly basis. Our Facebook post had about 12 businesses interested and we offered it to the first person as their prices were reasonable.
We can't fault the cleanliness of the cars but we have an issue with the owner as his BO is horrendous. The people who had their cars washed after lunch mentioned to me their cars smelt... they did. He also left a lingering smell in the reception area!
AIBU to change companies? It's been 3 consecutive occasions and it's really not pleasant. I don't know how you politely tell someone they smell 