There are commercial products but you can also you can use a vinegar and water base. Ensure there are no electrical devices plugged in or left on the counter top.
1. Start by giving the taps a good spray, leave for a few minutes.
2. Use a toothbrush to scrub around the edges of your tap and the base of your tap, and then down in where the handles join the base. This is where the calcium builds.
3. Use a cup of water to rinse off the chemical or cleaning solution.
4. Dry with paper towel, to polish it dry.