Also make sure that you do actually brush your teeth for the full 2 minutes required. (30 seconds can seem like 2 minutes but it is not).
Also make sure you brush ALL your teeth. Count the strokes --at least 20 strokes per area. Surprising when you start actually counting the strokes you find out that you are in reality brushing 3 times in one area and 30 times in another area. —even though you are thinking you are being consistent.
I use a hard brush 2-3 times a day, brushing the gumline rather than aiming for the sides of the teet themselves because that’s where the Bad Things™ live.