Been using this for years.
This works wonderfully. My tub, bathroom sink, and kitchen sink drains were sluggish. The tub was the worst. I poured the product into each drain and waited about 30 minutes. Then, I poured hot water into the drains and ....swoosh.<br /><br />My drains are so clear that you can see and hear the water gurgling down immediately.
Rating: 5 stars