What is the most logical next event?

How to clean a bathroom sink drain
Remove debris from the drain weekly.
To prevent buildups, remove any pop-up stoppers or drain guards on your sink and discard the debris that they've collected. Rinse them before replacing them.

Choices: (1). Decide on whether or not to use soap. When washing steel sinks, be sure to use a mild soap that won't damage the sink.; (2). If you're using your faucet, fill a bucket with water and allow it to come to a full, low boil. Fill it several times if you're using an electric hot water source.; (3). Most bathroom sinks feature an adjustable metal stopper than can be used to plug the sink. These can be removed by pulling them out of the drain.; (4). The water that comes out of the sink drains into the toilet tank. Remove any drain guards directly after each use to avoid clogging up the sink pipes.;
(3).