Its main purpose is to lubricate, to help the water sluice virus off your skin.
From the sacbee.com
The sluice was about to open, with Podolski opening the gates on each occasion.
From the independent.co.uk
Like a sluice box, the rocker box has riffles and a carpet in it to trap the gold.
From the en.wikipedia.org
A sluice box is essentially a man made channel with riffles set in the bottom.
From the en.wikipedia.org
The current tidal limit of the Axe is the sluice gates at Bleadon and Brean Cross.
From the en.wikipedia.org
The material passes through a sluice box, which traps heavier gold particles.
From the sacbee.com
Moisture is required to sluice off dirt and highlight that elusive spark of colour.
From the couriermail.com.au
The Kaymakam puts soldiers to guard the sluice gates and prevent irrigation.
From the en.wikipedia.org
Non-biodegradable bags spoil beaches, block drains and sewers and foul sluice gates.
From the guardian.co.uk
More examples
Pour as if from a sluice; "An aggressive tide sluiced across the barrier reef"
Conduit that carries a rapid flow of water controlled by a sluicegate
Irrigate with water from a sluice; "sluice the earth"
A sluice is a water channel that is controlled at its head by a gate (from Dutch word 'sluis'). For example, a millrace is a sluice that channels water toward a water mill. The terms "sluice gate", "knife gate", and "slide gate" are used interchangeably in the water/wastewater control industry.
(Sluicing) In syntax, a sluicing construction is one in which the sentential part of an interrogative clause is elided; this typically occurs only in constituent questions (not polar questions). ...
An artificial passage for water, fitted with a valve or gate, as in a mill stream, for stopping or regulating the flow; also, a water gate or flood gate; Hence, an opening or channel through which anything flows; a source of supply; The stream flowing through a flood gate; A long box or trough ...
(SLUICING) The act of washing gold from river gravel through the use of a sluice box.
A structure containing a gate to control the flow of water from one area to another.
Water going through a very narrow passage between two rocks at high speed. Usually terminates in a strainer or something equally nasty, and should be avoided.