Hey Bin,
If you havent done this before, then follow this, shutdown the Valve first then open the faucet from both sides upwards and downwards. If you still need more information you can possibly get ... read more
We keep a spray bottle filled with the solution below on the counter and use it as needed. We apply sealer once a year.
•1/2 cup rubbing alcohol•2 cups water•8 drops dawn dish soap