• Ensure that the vac is switched off.
• Remove the transparent panel on the side of the appliance by lifting the two latches either side
• Lift the black circular filter out of compartment 
• Wash the filter with cold water only
• Keep the filter under running water until the water runs clear
• Remove excess water by squeezing and twisting the filter
• Keep the filter on a clean, flat surface to air dry for at least 24 hours. Do not put the filter into a washing machine, tumble dryer.
• Once completely dry remove transparent panel on side of appliance
• Place the filter into the circular compartment; ensure that this is securely in place. 
• Replace the transparent panel and make sure it is securely attached before turning vac back on.