How often do you floss? Will dental plaque be removed in time or do I need to go to a dentist?

I floss daily, in the evening before I brush my teeth. See your dentist for a cleaning, and go 2x/year. If you have a lot of build up (wine, coffee, smoking, or just the teeth that seem to collect plaque/stain), you can get a deep cleaning. Find a compassionate dentist who understands gentle dentistry.