Inspect and Clean P-Trap Components

What happens here

Once the P-trap U-bend is removed, visually inspect its interior to assess the extent and nature of the clog. Often, a significant amount of hair, soap scum, grease, and other debris will be present. Begin by using a paper towel or rag to wipe out the most accessible and loose gunk from inside the pipe. For more stubborn or deeper blockages, insert a drain cleaning brush (like a bottle brush) into the P-trap and scrub the inner surfaces vigorously to dislodge any stuck-on grime. If there are large clumps of hair or other solid debris that the brush can't remove, use a pair of pliers to carefully reach in and pull them out. Continue cleaning until the interior of the P-trap is free of all visible obstructions and buildup.

Goal: Inspect the removed P-trap for clogs, then use a paper towel, a brush, and pliers to thoroughly remove all accumulated gunk, hair, and debris from the interior.