If your drain isn't flowing as easily as it should, then it's probably a bit clogged. Instead of paying big bucks for chemical-filled concoctions, try fixing the problem yourself with a homemade drain cleaner.
Natural homemade drain cleaner and declogger: For those of you who hate poison-type drain cleaners, use white vinegar and baking soda. This will clean and unclog a drain. Also drops of white vinegar in your pet's water will keep away fleas and ticks!