The amount of maple syrup you use won't affect how much cleaning happens so don't worry about that. It's just what gives you the energy (and some nutrients) to function while fasting.
A white tongue is an easy way to gauge how a detox is going but it isn't that reliable. More importantly listen to your body. Do you have detox symptoms or extra energy? Many other factors will show you the progress you are making if you just take the time to focus on yourself.