Sep 10, 2018 - 05:54 AM
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You are best served to use a toothbrush over the nozzle holes and gently rub. This will clear any debris/deposits left on the surface.
Cleaning the nozzle can be cleaned manually by pressing “Posterior Wash”( / ) button for 3 seconds without being occupied on the seat and nozzle will come out without spraying water. After cleaning the nozzle, Press “Stop”( , ) button to return nozzle to stand-by mode. Information located on Page 13 of the Simple Operation panel -Remote Model)
Source: BB1000 Nozzle Cleaning