The calcium deposits should be cleaned out of the tank every 10-15 uses to ensure proper operation of the machine.
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Unplug the power cord from the electrical outlet and let the steamer cool off.
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Press down on the boiler safety cap and turn it counterclockwise to remove it from the boiler.
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Measure 8 ounces of vinegar, pour it in the boiler and add 40 ounces of water. Let the cleaning solution sit in the boiler for approximately 8 hours. Do not put the safety cap back on the boiler.
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Turn the steamer upside down over a sink to dump the solution out of the boiler.
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Rinse out the boiler with water to remove any of the remaining solution left in the boiler.