| http://www.w3.org/ns/prov#value | - If you get deposits the best thing is a small handful of ordinary washing soda dissolved in warm water, a half hr soak, a good shake then pump through to clear the tube and wand, them rinse thoroughly with cold water including the tube and wand, its important the wand is flushed as many are aluminium and the washing soda will corrode aluminium if left in contact for more than a few minutes, W/soda
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