13587 is quite right. Your white coating simply mirrors the state of your intestines and it tells you you should cleanse your bowels.
While cleansing, the white will remain. At this stage, when I stop cleansing my tongue gets pink again, yet I am not quite over with candida and must carry on with the cleanses... and cope with the white coating.
If you pay attention you will notice that it gets worse when your bowels suffer.