Well I guess I am the only cheap one here, I use the battery operated SpinBrush. Got my first one free from a dental hygienist, just bought my replacement at Dollar General for less than $6. I like it because it has the round rotating part, great for getting around the back of your back teeth.
Pre-bedtime regime is getting quite extensive -
Brush with electric toothbrush
Floss
Water pik
Mouthwash
Night cream under eyes.
Sigh....life was easier when I was 40 years younger!!