Ah yes, the nice fluffy blue griots towels. Blue for spray wax, green for interior, weird texture blue for windows, yellow for dried on wax removal towels, I've got the set
. I only use those for waxing/polishing, I thought you meant drying the car after a car wash or something, and for that I use the yellow waffle towel.
I haven't before done the tape method for seeing results, but I will try that.