I've had a permanent retainer in my bottom 4 teeth for about 5 years now. I recently started a habit of flossing, but it takes too much effort for me to use the official flosser for those. But, I recently started using the proxabrush every morning, which takes about 5 seconds per tooth and gets about 90% of the job done.

I've been doing it for 2 months almost every day now.