What are the disadvantages of a waterless car wash?

A waterless car wash has a few drawbacks. First, it may not remove all stubborn dirt and dust particles, which could lead to scratches on the paintwork. Additionally, it is less effective with larger amounts of dirt, such as mud or insect remains. Moreover, using waterless products can sometimes leave residue if not properly wiped off, which may affect the shine. Therefore, it is important to use the right technique and products for the best results.