[kaliszad]

If you brush for 2 minutes I can guarantee you have not cleaned your teeth properly if you have 28-32 of them, use interdental brushes (TePe, Curaprox)/ superfloss and a regular tooth brush.

If you are worried about brushing off your enamel, you should get correct tooth brushes, not use abrasive tooth pastes, not brush immediately after drinking acids as another commenter has written. Some people have soft enamel but effect of some medication/ sickness/ malnutrition during childhood but that is relatively rare. If in doubt, consult dental hygiene specialist or a dentist.

Source: My wife is an established dental hygienist keeping up with the newest approaches, going to advanced courses/ master classes, visiting conferences.