Describe the pattern
State colour, texture and whether marks affect one garment or many. Include products used and whether the marks were noticed before drying.
Keep evidence specific
A photograph of the mark and the programme details may support assessment. Do not describe every dark mark as bearing grease or order a seal from the appearance alone.
A useful distinction
A mark that transfers after tumble drying belongs in a different sequence from one seen immediately after washing. Keeping the point of discovery clear prevents the wrong appliance becoming the assumed source.