Unplug the appliance.
Turn off the water tap.
Unscrew the water supply hose.
Remove the seal and the plastic filter with a pair of small pliers or scissor grips.
Clean the filter under running water with a brush.
Refit the filter and gasket and make sure that it is sitting correctly.
Refit and secure the water supply hose in reverse order. Do not use any mechanical device to tighten the hose. A soft cloth can be used to assist hand tightening.
If insufficient water flows into the appliance, check that the filter is not blocked.
If there is a leak, the water supply hose will need to be checked for proper connection.
Never over tighten the water supply valve or use mechanical devices to tighten.