Swirls are integral part of the paint
Sooner or later they are there no matter how hard you follow the drill. I have stopped worrying about them.
However I will continue to use quality products and towels. Will use Karcher in summers and mostly use Carpro waterless wash at home.
My porch is like a wind tunnel with a high windchill factor, so washing is terrible in winters. But still it's once a while when I take my car to service stations and its well protected by detergent proif Collinite wax.