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The TOTO Washlet is an innovative toilet seat which features an integrated bidet. The bidet feature activates at the push of a button on the seat or a remote control; a small wand extends from the back of the rim and begins to jet water towards the backside of the user. Different Washlet models have features such as air fresheners, seat heaters, and dryers.
Washlet's Basic features
The most basic feature is the integrated bidet, a nozzle the size of a pencil that comes out from underneath the toilet seat and squirts water. It has two settings: one for the anus and one for the vulva. The former is called posterior wash, general use, or family cleaning, and the latter is known as feminine cleaning or feminine wash. At no point does the nozzle actually touch the body of the user. The nozzle is also self-cleaning and cleans itself before and after operation. The user can select to wash the anus or vulva by pressing the corresponding button on the control panel. Usually the same nozzle is used for both operations, but at a different position of the nozzle head, and using different openings in the nozzle to squirt water at a different angle to aim for the correct spot. Occasionally, two nozzles are used, each dedicated for one area. The control logic is also attached to a pressure switch in the toilet seat, and operates only if there is pressure on the seat, indicating that the seat is occupied. The very first models did not include this automatic switch-off. A number of curious users pressed the button while watching the toilet to see its mode of operation, and promptly received a jet of warm water in their face.
Customization
Most high-tech toilets also provide the option to select the water pressure to adjust to the preferences of the user. By default, the vulva receives less pressure than the anus. Usually, the temperature of the water can also be adjusted. Researchers in Japan have found that a water temperature slightly higher than the body temperature is preferred by most customers, and 38 °C is considered best. The exact nozzle position can also often be adjusted forward or aft manually. High-end washlets also provide options for a vibrating and pulsating jet of water. The manufacturers claim that this helps with constipation or hemorrhoids. The most advanced washlets can even mix the water jet with soap for an improved cleaning process.
The washlet can replace toilet paper completely, but many users opt to improve the hygiene in combination with the mechanical action of the toilet paper. This also depends on the cleaned region, and the cleaning of the vulva may not need toilet paper. Some people use toilet paper before washing, some after washing, some use only the bidet and others do not use the bidet at all and prefer to use toilet paper. A second commonly found feature is a blow drier, often adjustable between 40°C and 60°C to dry the private regions after cleaning with the integrated bidet.
Advanced features
Other features may include a heated seat, which may be adjustable from 30°C to 40°C; an automatic lid equipped with a proximity sensor, which opens and closes based on the location of the user. Some even play music to relax the user's sphincter (some Inax toilets, for example, play the first few tunes of Op. 62 Nr. 6 Frühlingslied by Felix Mendelssohn). Other features are automatic flushing, automatic air deodorizing, and a germ-resistant surface. Some models specially designed for the elderly may include arm rests and devices that help the user to stand up after use. A soft close feature slows the toilet lid down while closing so the lid does not slam onto the seat, or in some models, the toilet lid will close automatically a certain time after flushing. The most recent introduction is the ozone deodorant system that can quickly eliminate the smells. Also, the latest models store the times when the toilet is used and have a power saving mode that warms the toilet seat only during times when the toilet is likely to be used based on historic usage patterns. Some toilets also glow in the dark or may even have air conditioning below the rim for hot summer days. Another recent innovation is intelligent sensors that detect someone standing in front of the toilet and initiate an automatic raising of the lid (if the person is facing away from the toilet) or the lid and seat together (if someone is facing the toilet).
Text explaining the controls of these toilets tend to be in Japanese only. Although many of the buttons often have pictograms, the flush button is often written only in Kanji meaning that users who are not well versed in the Japanese writing system may be unable to flush the toilet except through random button pressing. Thus, despite the many advanced features, the toilet is unusable for some foreigners.
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