Fisher & Paykel top loader washing machine self cleaning mode

My machine keeps telling me that it needs to be cleaned but I can't find out on the panel how to do this and I can't find my manual.

Wonder if it means the agitator is full of lint? to remove agitator, put your hand/arm down center of agitator and unscrew the white plastic knob. Agitator lifts off. Mine is always clogged with lint and crud.