Paint Scratches & Swirls
The spinning brushes can be aggressive depending on your car, and can leave paint scratches that can't be seen from afar.
Spinning Clothes
These "harmless and soft" clothes can Trap In Dirt From Previous Cars, Spreading It To Your Car
Harsh Chemicals are used to wash the car fast
These harsh chemicals can strip away protective wax layers and damage the clear coat. This will leave your car vulnerable to rust
No Attention To Detail leaving parts neglected
The machine are not operated to reach to every crevices of your exterior, leaving many spots properly washed and others neglected.
Air dry will mostly likely leave water spot
Air blow isn't sufficient & the sun will dry those remaining water droplets
Non-Professional/Extremely Used Vacuums
Lots of free vacuums are old and extremely used, and struggle to get into the deep fibers of carpets. Dirt can rise back up with a hit.
Vacuum Time Limit
When time is limited, so is your attention to detail for your car.
No Professional Safe Chemicals To Clean Exterior & Interior
Professional Chemicals can cost up to $250 on interior alone, and without the proper knowledge, your car's materials can suffer.
Use this link to see the real costs of interior tools and chemicals alone.