Tip: your winter wash routine is probably scratching your paint.
Cold months = more grit on the panel, and grit + one bucket + a dry chamois = swirl marks by spring. Three changes fix 90% of it:
(1) Pre-rinse or snow foam BEFORE anything touches the paint, let it pull the grit off
(2) Two buckets, grit guard in the rinse bucket, wash top-down
(3) Ditch the chamois; a plush drying towel with a spritz of drying aid glides instead of grinding.
Question for the group: what's your current drying method? Chamois, towel, blower, or "let the motorway handle it"? 😅 Be honest, no judgement.