How to change the wire bristles
To remove the bristles in order to insert new ones or to correct the shape of the existing set, you only need to turn the locking pins 90 degrees in either direction. This will enable you to remove the wire bristles. Once you have inserted the new or realigned wire bristles, you must lock them in place by rotating the pins back to their original position.
Twist the clips on the cleaning brush
Press the bristle inwards and take them out
Put the new bristle back in then twist the clips back to original position
Push the clips and it's done