This is what I use for a quickie.
100 ml in a 2 litre pump sprayer.
Go to the Jetwash.
Spray over the car.
Wait 5 mins while I clean my rims using another pump sprayer filled with shampoo.
£2 in the Jetwash to rinse off body, rims and undercarriage.
Job done : thumbs:
I'm a bit extra so I then rinse with deionised water in a couple of 2l coke bottles to prevent water spotting.
It'll never be clean enough with a touchless wash to use a drying towel after!