I moved to the UK about 11 years ago and started having problems with plaque. Never had in US, don't know if it was just my age or different water/diet.
At first I was prescribed an electric toothbrush which made my gums start to recede, so I stopped. I use a soft-bristled brush snd floss twice a day. I brush really thoroughly and floss correctly.
Still every time I go to the dentist they're surprised at how much plaque I have. They don't believe me that I floss!
I went to a new hygienist this afternoon and she wants me to come back in three months time.
What am I missing?