Doing the Master cleanses is probably where you should be continuing with.
It is really great with cleaning out toxicity.
I've had cysts clear out and hard spots on my skin disappear.
You can do one every three months. If you can go longer than ten days thats where the real deeper cleansing occurs.
If you have been on a good diet for four years then they should be fairly easy to do.
Two ten day cleanses over a three year period probably just scratched the surface.
I believe you can go all the way with continued cleanses.