Washing a car isn't rocket science. The customers pay for the convenience. A $20 inside/outside wash was done okay except the trunk wasn't even looked at. I've been to cheaper places that will at least attempt to vacuum the trunk.
If you don't want to clean your car, which I will have to still do after visiting Avanti AutoSpa, I would recommend you try one of the many other places.
I've edited my review to add an extra star based on the communication from the owner. It a decent policy but just not communicated. Hopefully, this can help others avoid frustration in the future.
Thank you.