Limescale remover
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I don't know about you, but we live in a hard water area. Every few weeks or so, despite using a filter jug, we have to descale the kettle because it begins to be coated with limescale. It doesn't stop the kettle from working; we can still make tea, but the water begins to taste a bit funny, and if we leave it too long, bits of limescale drop off into our coffee, which is totally unappealing to me. I suppose that if we left it long enough, the kettle would become less efficient, and it would take longer to boil, which would eventually reduce its usefulness. Sometimes our hearts can be like a kettle. If we allow the world in without allowing the filter of the Word to guide us, and washing of the Holy Spirit to clean us, they can become a little spiritually limescaled, too. It doesn't stop us from being Christians; it doesn't stop God from loving us; it doesn't negate his promises, and we can still go on serving him, but there's just someth...