First make a fresh solution of baking powder and water , about 3g of baking powder to 100ml of water, pour into a spray bottle
Unplug the Philips , take out the drawer unit and turn the fryer upside down
Spray onto the heater and surrounding dirty area and leave for 1 minute then put the Airfryer upright again, standing for about 30mins
Repeat the spraying step once more
Put the Airfryer upright and half fill the drawer with hot water, operate the Airfryer for 20 mins at 200 deg C
Let it cool down, but while warm, invert the unit again to clean the element with a cloth and behind with a toothbrush very carefully
Allow to dry thoroughly before using it again.