How do you clean ice maker?

Turn it off and bin the ice first. On most fridges the bin lifts out - warm soapy water, rinse, and dry it properly before it goes back. Wipe whatever parts of the maker you can reach with a cloth in half vinegar, half water. If the ice still tastes off after that, it's usually the water filter being overdue, or the ice soaking up freezer smells (an open box of baking soda in the freezer helps). Throw away the first couple of batches after cleaning.