Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Say goodbye to Liquid Plumber, Drano, etc.

I had a clogged sink that would take perhaps an hour to drain completely. I've tried various Liquid Plumber and Drano products in the past with mixed results. As a last resort, I took Consumer Reports' advice and decided to try CLR and whoosh! Within seconds my drain was unclogged. Fun to use too! Disclaimer: FIRMLY cover the overflow drain or there is a possibility gunk will come flying out of it! I learned the messy way ;)