just got my 97 boston green m3, and washed it. when its in the sun, i see shiny swirl marks, like a thin greasy residue is on the car. have washed it twice. looks like wax does before it drys, but very subtle. must be at the right angle to see it. any ideas and how to clean it off? i use regular old detergent when washing.

jason

use carwash soap..

that can be caused by using towels etc that were cleaned in laundry detergent

or using some odd soap on the car