TOTO toilets are widely praised for elite reliability, but standard mechanical wear over years of heavy use can occasionally cause minor issues. Common occurrences include a running tank resulting from hard water mineral sediment trapped beneath the flapper, slack in the trip lever chain, or wear on fill valve seals. For electronic Washlet smart models, temporary sensor glitches or calcium scale accumulation around spray wand nozzles can happen if routine maintenance is neglected.
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