What is the rule on using dental floss — containing fluoride and peppermint flavor — for a fasting person?

Fast Invalidators
Eating and Drinking
To Use Dental Floss
What is the rule on using dental floss — containing fluoride and peppermint flavor — for a fasting person?
If he does not swallow the saliva, it is no problem.
Source: Hadana adopted from the Istiftaat of the Grand Ayatollah Khamenei