How to cleaning a mineral-clogged toilet?

To remove calcified minerals left by hard water, pour vinegar heated to about 104 F into the over-flow tube, and let stand for at least 30 minutes.

Ream each hole thoroughly. On heavily clogged holes, use Allen wrench, and use large ones as you gradually unclog the hole. Remember that porcelain chips easily, so work carefully and use a pocket mirror to check your work.

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