Judging quotes by the headline number alone
A AED 30–40 wipe and a AED 90–110 steam job are different products, not the same product at different prices. Normalise method, scope, car size and access before comparing.
Letting anyone dry-wipe a genuinely dirty car
Waterless washing is safe on light dust and dangerous on bonded grime. After rain, a sandstorm, or two neglected weeks in open parking, a dry wipe grinds grit into the clear coat. The AED 20–50 saved over a steam wash converts into polishing bills of AED 150–400 later.
Ignoring building rules until there is a fine
Penalties for washing in undesignated areas are typically enforced against the resident and can exceed months of wash spending. One conversation with management before the first booking removes the risk entirely.