You will first want to locate the overflow hole and use the towel to close it. Then find the drain stopper and take it out.
Now grab the plunger and place it over the clogged drain. Push it in and out until you get some pressure built up. Take your time and keep trying to unclog the drain with the plunger as this is usually the quickest method to clearing it. You will notice the water draining very quickly if you manage to properly unclog the drain.
If the plunger does not work then it is a good idea to try using a pipe snake to help unclog the drain. Place the pipe snake in the drain and force down until it reaches the clogged area. Pull the pipe snake out and keep doing this until the drain unclogs.
The pipe snake is usually very effective at opening clogs however sometimes the blockage can be too much for it to handle and you will have to find an alternative method. Another quick way to unclog a drain is to pour boiling hot water and wait for a few minutes. If this doesn’t work then add more boiling hot water.
You can also use 1 cup of baking soda with 1 cup of vinegar to unclog your drain. If this still doesn’t work then try to use the plunger again with the baking soda and vinegar mixture.
There are also many different liquid drain cleaners available that are very effective at unclogging any blockage in the pipes. Purchase some extra strength liquid drain cleaner and carefully pour it down the clogged drain. You will have to wait for a few minutes to let the chemicals in the drain cleaner begin to work. Keep checking to see if the liquid drain cleaner is loosening the blockage by noting the level of the standing water. If you feel that the liquid drain cleaner is not working properly then you can also apply the plunger and try to get the blockage out of the pipes.