I recognise that double heart beat; I get it when playing tennis. Most disconcerting.
Concerning ‘tarnished silver’. Harken to this:

“Silver does not corrode in the accepted sense but is tarnished by hydrogen sulphide and other sulphur-containing gases. This can be removed by a standard silver polish. Alternatively, the reaction can be reversed, that is, the silver sulphide converted back to silver metal using the following procedure.

Mix about 4 tablespoons of washing soda with 2 pints of very hot water. Place a piece of aluminium foil in the bottom of a plastic mixing bowl and stand a piece of tarnished silverware on the aluminium foil. Wearing rubber gloves, pour the hot soda solution into the bowl until the silver item is completely covered (make sure it remains in contact with the aluminium foil). Within a few minutes the tarnish will transfer from the silver to the aluminium foil. Remove the now sparkling silver item, rinse and dry it with a soft cloth.”