It is important to avoid cleansers that contain ammonia or chlorine, which can cause permanent stains.

Cetylpyridinium chloride may cause brown stains between the teeth and on the surface of teeth.

Despite our best efforts, dirt and mud get everywhere, causing unsightly stains.

The liquid has a foul odour (similar to that of dead leaves) and can cause stains.

Dentists say tea - especially the basic black variety - can cause more stains than coffee.

Juices and pies made from those fruits can also cause stains.

On top of being gross, these trails can cause stains and odors.

The problem with water, besides warping and roughening the grain of the wood, is that, like other agents, it causes stains.

Laundry was first done in watercourses, letting the water carry away the materials which could cause stains and smells.

In porcelain sinks, basins and bathtubs, constant contact with water also causes stains.