Brown, dry patches on a pothos by the window: why the leaves look like this

Your pothos has dry, dead patches that fit light scorch best, often combined with the leaf drying out a little between waterings. The photograph shows dark brown, crisp areas along the leaf edge and smaller dry patches in the middle, typical of a leaf exposed to too much direct sun through a window.

The brown areas will not turn green again. Remove the leaf if it bothers you, or leave it until the plant has produced new leaves. Move the pothos a little farther into the room or to a window with filtered light. In September in this Swedish setting, a bright position often still works well, provided you avoid the strongest direct midday sun.

Water when the top few centimetres of compost have dried out, avoiding swings between bone dry and waterlogged. If new leaves continue developing small dark patches despite gentler light, especially with yellow margins around them, investigate watering, cold draughts from the window or leaf spot disease. If the damage remains limited to a few exposed leaves, it is mainly old light damage and not serious.