I've never gone to one of these car cleaning places in supermarket car parks, I'm very intimidated by the group of guys there are there and having to reverse into a space while everyone is watching.
But my car is filthly, been waiting until it passed its mot before doing anything.
It is really really messy inside. Obviously I'll empty it but can it ever be too dirty to drop off at one of these places? Its an old car and I usually only see people with nice cars with light soiling using them.