Tarnish on silver is a thin layer of silver sulfide, formed by sulfur compounds in the air or in foods such as eggs. Lay your silverware on a sheet of aluminum foil in a basin, then cover with very hot water and baking soda. The more reactive aluminum grabs the sulfur, turning the tarnish back into metallic silver, without stripping metal away the way an abrasive polish does.
Chlorine on its own is fairly gentle. But when it combines with urine, sweat and other grime from swimmers, it forms chloramines, which cause stinging eyes and that classic 'chlorine smell'. A well-kept pool barely smells at all. Shower before you swim and never pee in the water.
Muscle mass slowly shrinks with age, putting independence at risk. But in 1990, a study had nursing home residents aged 86 to 96 train their legs for eight weeks: their strength more than doubled. Muscle responds to training at any age. Getting up from a chair without using your hands is already an exercise.