Step 5 · Disassemble and Clean the P-Trap
If plunging fails, the clog is likely in the P-trap. With your bucket positioned underneath, use a pair of channel-lock pliers to loosen the two large slip nuts holding the curved P-trap in place. You may be able to loosen them by hand. Once loose, unscrew them the rest of the way and gently pull the trap downwards. Be ready for water and sludge to spill into the bucket. Take the P-trap to another sink or outside, empty its contents, and use a bottle brush or a bent wire coat hanger to scrub out all the grease and debris. Rinse it thoroughly, then reinstall it, making sure any washers are properly seated. Hand-tighten the nuts first, then give them a final quarter-turn with the pliers.