Use a regular toilet plunger to clear a clogged kitchen sink. For sanitary reasons, It is advisable to have two plungers in your home, one for toilets and another one for bathtub or kitchen clogs. Partially fill the sink with water. Place the plunger over the drain so that it seals the opening. Forcefully, push the plunger up and down about seven or eight times to loosen the clog. Pull the plunger quickly away from the drain. The water will usually drain out, but if it doesn't, repeat the method.
A cable auger is similar to a toilet snake except it is for sinks and other drains. It is a long flexible cable you can purchase at discount, home supply or hardware stores. Get under the kitchen sink and remove the trap with a pipe wrench. Have a bucket handy to catch any water that comes out. Unscrew the coupling with your hand. Check the trap to see if it contains the clog. Remove the horizontal trap arm. It sticks out from a stub out -- a protective plug -- in the wall. Insert the cable into the stub out. Do this until you feel a resistance. Pull approximately 18 inches of the cable auger out of the area. Tighten the screw on the cable. Turn the handle in a clockwise direction while pushing the cable into the pipe. Repeat the method until you feel or hear the clog loosen. If you feel the cable catch on an object, turn the handle counterclockwise and pull back on the cable auger. Once the object clears, push forward on the cable and continue to crank the handle. Take the cable out. Replace the trap arm and sink trap. Fill the sink with hot water and use the plunger if the water doesn't drain efficiently. Often, the clog is loosened enough to remedy the problem with a few plunges.
Baking Soda Method
Baking soda and vinegar combine to make an effective drain cleaner. Pour 1/2 cup of baking soda into the kitchen sink drain. Slowly pour 1/2 cup of white distilled or apple cider vinegar over the baking soda. Cover the area and let the bubbling, foaming action dissolve the clog. Leave solution in the drain for three or four hours. Pour hot water down the drain to flush the pipe. Run water into the sink to ensure the clog is clear; if the clog persists, repeat the method.
Homeowners should not pour grease or other fatty substances down the drain. If you do this the grease builds up and results in clogged pipes. Pouring a large pot of boiling water down the drain will melt the substance and clear the clog. Repeat the method if necessary. In the future, wipe out greasy pots and pans with a paper towel before washing them in the sink.