You will need:
Justime cleanser (can be acquired at any official dealer) or any neutral pH detergent*.
Piece of soft cloth.
*Don’t use any abrasive or caustic cleaning agents or “no-rinse” cleaning products.
Apply Justime cleanser on the faucet surface evenly
Spread the cleanser on the dirty area (or fully) of the faucet
And your chrome faucet will look fresh, shiny and clean.