My master bath shower drain is very slow. I pulled the drain cap pff to find that the drain is clogged with what looks to be years of hair and calcium and lime scale from hard water. 
What is the best way to clean this out and does anyone have a recommendation on the best drain cleaner? Is there one that will dissolve the hard water scale? CLR?

What is the best way to clean this out and does anyone have a recommendation on the best drain cleaner? Is there one that will dissolve the hard water scale? CLR?


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