Learn how to easily unblock a kitchen sink clogged with food particles in simple steps. Every time you clean your dishes and bowls at your home kitchen some food particles wash out and get clogged. When these particles are clogged the water starts to drain out slowly and bad odor arises. Put some Alka Seltzer tablets in your sink and crumble them through the holes. Now pour some vinegar over the tablets through the hole. Leave it for two minutes and flush the sink with water to finish.