Only some windows have condensation. Why?

When only certain windows have condensation, it is possible that air is not circulating properly around the window. In order for air to circulate properly, be sure to install the window coverings at least 2.5 inches from the glass surface and that blinds are always raised at least 1.5 inches from the sill. Never stick anything to the window glass and be sure to remove all manufacturer stickers. Opening your curtains and blinds will greatly improve the circulation around the window.