Goodbye beerstone: A shameful admission

According to Wikipedia, "Beerstone is a scale of calcium oxalate (C₂CaO₄) that can occur in tanks, kegs and other metal components used to brew or store beer." After today's brew session (a seriously hopped IPA at over 80 IBU's) I decided to finally clean the beerstone that had accumulated in my brew kettle. I'd like to say I do this every brew, every other brew, or even once a month. The sad reality is I tend to let it build up enough that I just can't do another brew until it's clean (I'm guessing every 10-12 brews, which is about 6 months for me). A nice soaking with PBW at 160 degrees for around 15 minutes was all it took to loosen up the muck enough so that I could easily wipe it with a sponge. The kettle is clean now, and hopefully I won't wait quite so long to do it again!