sweating toilet

Every year around this time my toilet begins to sweat and makes a wet mess on the floor. It's not the toilet tank, but the underside of the bowl. Wipe your hand under the bowl and get a handful of water. Is there anything to do to prevent this?
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It does it this time of year because the humidity is high. Does it quit later in the summer?
It sounds like you have a leaking flapper valve and an insulated tank that is preventing the tank from sweating.
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Joseph E. Meehan

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If you're positive it's not a leak, which is doubtful unless the tank is already insulated, drop a fish-tank heater in the tank. This will feed warmer water into the bowl when you flush, and thus reduce sweating.
And get a dehumidifier.
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