The advise is (as I understand it) to drink more water and brush your teeth more often.
Be careful what you use and I would check with your counsellor.
TBH, I chewed gum, although there is a risk that chewing gum can make some people feel hungry (not good if you are SSing). It didn't affect me and I found it helped.
The downside is that before the diet, I NEVER chewed gum, not even after the diet, I chew almost all the time. Still, if that was the only drawback, I'll take it.
Good Luck