How can I effectively treat and prevent brown spots on my houseplant leaves?

To effectively treat and prevent brown spots on your houseplant leaves, you can start by ensuring proper watering, providing adequate sunlight, and maintaining good air circulation. Remove any affected leaves promptly and avoid over-fertilizing. Consider using a fungicide or insecticide if pests are the cause of the brown spots. Regularly inspect your plant for any signs of disease or pests to address issues early on.